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7 tháng 7 2023

1. A

2. A

3. B

4. A

5. B

6. B

7. A

Complete the sentences with comparative or superlative form1. Mount Everest is (high) __________________ mountain in the world.2. Which planet is (close) __________________ to the Sun than the Earth?3. The weather this summer is even (hot) __________________ than last summer.4. Your accent is (bad ) __________________ than mine.5. They live in a (big) __________________ house, but she lives in the (big) __________________ one.6. French is considered to be (difficult) __________________ than...
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Complete the sentences with comparative or superlative form
1. Mount Everest is (high) __________________ mountain in the world.
2. Which planet is (close) __________________ to the Sun than the Earth?
3. The weather this summer is even (hot) __________________ than last summer.
4. Your accent is (bad ) __________________ than mine.
5. They live in a (big) __________________ house, but she lives in the (big) __________________ one.
6. French is considered to be (difficult) __________________ than English. but Chinese is the (difficult) __________________ language.
7. Going by car is (convenient) _________________________ going by bicycle in this area.
8. The Sahara is (hot) _________________ desert in the world.
9. This building is (modern) ______________________ that one.
10. The boat trip is (good) _________________ experience of my life.
11. Are your streets (narrow) __________________________ our streets?
12. It’s (beautiful) _________________________ mountain in Australia.

 

1
13 tháng 12 2021

the highest - closer - hotter - worse - bigger - biggest - more difficult - the most difficult - more convenient than - the hottest - more modern than - the best - narrower than - the most beautiful

V/Read the following passage, then choose the correct answer to questions 26- 30. Planet earth is part of a system of planets and their moons, as well as numerous asteroids and comets which (26)_________around a huge star we call the Sun. The Sun itself (27)_________of gas. Nuclear reactions inside its core (28)_______the heat and light that make life on the Earth (29)________. The Earth is the third of four small terrestrial (Earth like) planets that orbit close to the (30)_________....
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V/Read the following passage, then choose the correct answer to questions 26- 30. Planet earth is part of a system of planets and their moons, as well as numerous asteroids and comets which (26)_________around a huge star we call the Sun. The Sun itself (27)_________of gas. Nuclear reactions inside its core (28)_______the heat and light that make life on the Earth (29)________. The Earth is the third of four small terrestrial (Earth like) planets that orbit close to the (30)_________. Further out in our Solar System are four huge gas planets, while distant Pluto, (31)_________planet, is made (32)_________rock and ice. Our Earth is one of the ten planets that orbit the Sun- a huge, burning-hot star in the center of our Solar System. The Solar System and all the stars in the (33)_________are part of our galaxy-the Milky Way, which (34)________as many as 200 billions stars. Beyond our galaxy (35)_________millions more galaxies. They all add together to make up the Universe. 26. A. run B. orbit C. turn D. walk 27. A. consists B. remains C. includes D. maintains 28. A. produce B. product C. production D. productive 29. A. able B. possibility C. possible D. ability 30. A. Earth B. Mars C. Mercury D. Sun 31. A. the smaller B. smallest C. the most smallest D. the smallest 32. A. from B. of C. for D. in 33. A. space B. Universe C. Moon D. sky 34. A. consists B. makes from C. stays D. contains 35. A. is B. are C. to be D. get VI. Read the following passage and choose the correct answer A, B, C or D (10 points) "How can I learn English well?" This is a question many students ask. In my opinion, the most effective way is to learn lessons by heart. If you can recite the text and write it out, you've learned it fairly well. And if you can tell, in your own words, what the lesson says you're a very successful learner indeed. Your English will be quite perfect. This is a difficult task. However, if you try to learn by heart only part of each lesson, you'll find it not half so hard as you might have thought. Learning this way, you will make rapid progress. Of course, writing is also necessary. It helps you a lot on your way to success in English. What is equally important is to feel the language. You should be able to laugh at jokes and be shocked at bad news. When using English, try to forget your mother tongue. Instead of helping you, your own language gets in your way. So, never try to see English through translation. 56 In the writer's opinion, the most effective way in learning English is ____________ A. to practise speaking, writing and feeling it B. to forget your own native language C. to translate everything into his own language D. to memorize the English words and grammatical rules 57. According to the text, when learning an English lesson it is important to be able to ______________ A. read aloud the language B. memorize all the words you learn in the lesson C. tell what the lesson says in your own words D. remember your mother tongue 58. "Instead of helping you, your own language gets in your way." This sentence means that memorizing your own language can ___________________. A. help you to study English well B. stop you from mastering English C. make English easy to learn D. help you notice mistakes 59. What is equally important is to feel the language. "To feel the language" here means ____________. A. to get knowledge of English by touching B. to be able to read and write English C. to translate English into your own by imagining D. to be able to experience the rich sensation of the language 60. When using English, try to _______________. A. see English through translation B. forget your mother tongue C. think in your own language D. translate English into your own VII/Complete the second sentence so that it has a similar meaning to the first one. 1. The girl is very friendly. She lived next door to us. - The girl who_______________________________________. 2. “What is your name?” Mr. Brown asked me. - Mr. Brown asked me_____________________________________. 3. Learning English is very necessary. - It is__________________________________________________. 4. Although his leg was broken, he managed to get out of the car. - In spite of his________________________________________. - In spite of the_____________________________________________. 5. If someone doesn’t put the coal in, the fire will go out. - Unless______________________________________________.

1
28 tháng 6 2021

V/Read the following passage, then choose the correct answer to questions 26- 30.

Planet earth is part of a system of planets and their moons, as well as numerous asteroids and comets which (26)_________around a huge star we call the Sun. The Sun itself (27)_________of gas. Nuclear reactions inside its core (28)_______the heat and light that make life on the Earth (29)________. The Earth is the third of four small terrestrial (Earth like) planets that orbit close to the (30)_________. Further out in our Solar System are four huge gas planets, while distant Pluto, (31)_________planet, is made (32)_________rock and ice. Our Earth is one of the ten planets that orbit the Sun- a huge, burning-hot star in the center of our Solar System. The Solar System and all the stars in the (33)_________are part of our galaxy-the Milky Way, which (34)________as many as 200 billions stars. Beyond our galaxy (35)_________millions more galaxies. They all add together to make up the Universe.

26. A. run B. orbit C. turn D. walk

27. A. consists B. remains C. includes D. maintains

28. A. produce B. product C. production D. productive

29. A. able B. possibility C. possible D. ability

30. A. Earth B. Mars C. Mercury D. Sun

31. A. the smaller B. smallest C. the most smallest D. the smallest

32. A. from B. of C. for D. in

33. A. space B. Universe C. Moon D. sky

34. A. consists B. makes from C. stays D. contains

35. A. is B. are C. to be D. get

VI. Read the following passage and choose the correct answer A, B, C or D (10 points) "How can I learn English well?" This is a question many students ask. In my opinion, the most effective way is to learn lessons by heart. If you can recite the text and write it out, you've learned it fairly well. And if you can tell, in your own words, what the lesson says you're a very successful learner indeed. Your English will be quite perfect. This is a difficult task. However, if you try to learn by heart only part of each lesson, you'll find it not half so hard as you might have thought. Learning this way, you will make rapid progress. Of course, writing is also necessary. It helps you a lot on your way to success in English. What is equally important is to feel the language. You should be able to laugh at jokes and be shocked at bad news. When using English, try to forget your mother tongue. Instead of helping you, your own language gets in your way. So, never try to see English through translation.

56 In the writer's opinion, the most effective way in learning English is ____________

A. to practise speaking, writing and feeling it

B. to forget your own native language

C. to translate everything into his own language

D. to memorize the English words and grammatical rules

57. According to the text, when learning an English lesson it is important to be able to ______________

A. read aloud the language

B. memorize all the words you learn in the lesson

C. tell what the lesson says in your own words

D. remember your mother tongue

58. "Instead of helping you, your own language gets in your way." This sentence means that memorizing your own language can ___________________.

A. help you to study English well

B. stop you from mastering English

C. make English easy to learn

D. help you notice mistakes

59. What is equally important is to feel the language.

"To feel the language" here means ____________.

A. to get knowledge of English by touching

B. to be able to read and write English

C. to translate English into your own by imagining

D. to be able to experience the rich sensation of the language

60. When using English, try to _______________.

A. see English through translation

B. forget your mother tongue

C. think in your own language

D. translate English into your own

VII/Complete the second sentence so that it has a similar meaning to the first one.

1. The girl is very friendly. She lived next door to us. -

The girl who___ lived next door to us is very friendly____________________________________.

2. “What is your name?” Mr. Brown asked me.

- Mr. Brown asked me____what my name was_________________________________.

3. Learning English is very necessary.

- It is______very necessary to learn E____________________________________________.

4. Although his leg was broken, he managed to get out of the car.

- In spite of his______ broken legs, he managed to get out of the car. __________________________________.

- In spite of the___broken leg , he managed to get out of the car.__________________________________________.

5. If someone doesn’t put the coal in, the fire will go out.

- Unless_____someone puts the coal in, the fire will go out._________________________________________.

Write the correct form of the words in brackets. The Glay practice rice ____________ in submerged fields. (cultivate) * 1 point Your answer This is a required question Supply the correct tense or form of the verbs in brackets. Sa Pa’s love market ______________ (be) an unique aspect in the culture of the Mong and Dao ethnic groups for a long time. * 1 point Your answer Write the second sentence so that it has a similar...
Đọc tiếp
Write the correct form of the words in brackets. The Glay practice rice ____________ in submerged fields. (cultivate) * 1 point Your answer This is a required question Supply the correct tense or form of the verbs in brackets. Sa Pa’s love market ______________ (be) an unique aspect in the culture of the Mong and Dao ethnic groups for a long time. * 1 point Your answer Write the second sentence so that it has a similar meaning to the first one. A lot of people take the train from Oxford to London every day. (travel) * 1 point Your answer Supply the correct form of the words in brackets. I enjoy ______________ with friends and going out at the weekend. (social) * 1 point Your answer Write the second sentence so that it has a similar meaning to the first one. Your village is so beautiful! (What) * 1 point Your answer Write the correct form of the words in brackets. Festivals characterize customs and ____________ of a community. (believe) * 1 point Your answer Complete the sentences with the correct form of the words in brackets. Robert arrived at the meeting _____________ than Francis. (late) * 1 point Your answer Supply the correct form or tense of the verbs in brackets. Hoa Ban festival ____________(start) on March 17thand ____________(end) on March 19th. * 1 point Your answer Write the second sentence so that it has a similar meaning to the first one. Romantic films interest me more than war films. (I find) * 1 point Your answer Complete the sentences with the correct form of the words in brackets. People in rural areas wear _____________ than those in cities. (simple) * 1 point Your answer Write the correct form of the words in brackets. The Pa Then believe that the god of fire brings them ___________ and prosperity. (peaceful) * 1 point Your answer Complete the sentences with the correct form of the words in brackets. These trousers are too wide. Do you have any that are _____________? (narrow) * 1 point Your answer Write the correct form of the words in brackets. The communal house is usually used for village ____________. (festival) * 1 point Your answer Write the correct form of the words in brackets. The Tay community practice ______________ religious beliefs including ancestor worship. (tradition) * 1 point Your answer Write the second sentence so that it has a similar meaning to the first one. How long is it since you built this stilt house? (When) * 1 point Your answer Complete the sentences with the correct form of the words in brackets. I think his new book is much _____________ than his last one. (boring) * 1 point Your answer Supply the correct tense or form of the verbs in brackets. When I was a kid, I ______________ (spend) hours gleaning rice from paddy fields. * 1 point Your answer Write the correct form of the words in brackets. The government carried out a programme to ____________ the health service in remote and rural areas. (modern) * 1 point Your answer Supply the correct form of the words in brackets. She was ______________ with her job and decided to look for a new one. (satisfy) * 1 point Your answer Supply the correct form or tense of the verbs in brackets. The elephants help local people _______________(work) in the fields, and carry goods or construction materials. 1 point Your answer Supply the correct form or tense of the verbs in brackets. The first Brau _______________(come) to Vietnam about a century ago. * 1 point Your answer Supply the correct form or tense of the verbs in brackets. Listen! _______________ those ethnic girls _______________(speak) the Ede language? * 1 point Your answer Complete the sentences with the correct form of the words in brackets. He doesn’t look as _____________ as he used to. (happy) * 1 point Your answer Supply the correct form or tense of the verbs in brackets. In the future, the local government _______________(organize) more activities to promote the culture of ethnic groups. * 1 point Your answer Write the correct form of the words in brackets. Ethnic ____________ make up about 15 percent of Vietnam’s population. (minor) * 1 point Your answer Supply the correct tense or form of the verbs in brackets. Where is Jeanny? ~ She ______________ (practise) the piano in the music room. * 1 point Your answer Write the second sentence so that it has a similar meaning to the first one. Although the villagers are quite poor, they live a happy and healthy way. (In spite of) * 1 point Your answer Write the correct form of the words in brackets. Each time I returned I was struck by the ____________ of Sapa and its people. (unique) * 1 point Your answer Write the second sentence so that it has a similar meaning to the first one. Living in a big city is more convenient than living in a village. (It's) * 1 point Your answer Supply the correct form of the words in brackets. Face to face ______________ is better than Skype video calls. (communicate) * 1 point Your answer Write the correct form of the words in brackets. The population of Vietnam contains a rich ____________ of ethnic groups. (diverse) * 1 point Your answer Supply the correct form or tense of the verbs in brackets. Tourists to Don Village enjoy __________(ride) elephants around the hamlet or to the forest. * 1 point Your answer Supply the correct form or tense of the verbs in brackets. We _______________(be) to Buon Me Thuot city twice, but we _______________(never/ visit) Don Village. * 1 point Your answer Supply the correct form of the words in brackets. The Internet is very ______________, it takes up a lot of our time. (addict) * 1 point Your answer Supply the correct form or tense of the verbs in brackets. These stilt houses _______________(build) over 50 years ago by the Tay people. * 1 point Your answer Write the second sentence so that it has a similar meaning to the first one. What did the local people say? (Could you tell me) * 1 point Your answer Supply the correct form of the words in brackets. Are you ______________ about the new Gears Of War games? (excite) * 1 point Your answer Supply the correct tense or form of the verbs in brackets. ______________ (you/ ever/ take) a trip to the countryside? It’s really interesting! * 1 point Your answer Supply the correct form or tense of the verbs in brackets. So far Nick _______________(learn) a lot about the ethnic minorities in Vietnam. * 1 point Your answer Write the correct form of the words in brackets. Vietnam is one of the most ____________ diverse countries in South East Asia. (ethnic) * 1 point Your answer Back Submit
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Exercise 3: Complete the following sentences with the correct form of the adjective or adverb, comparative or superlative of the words provided.1. This is ___________________________ (fancy) dress I own.2. In my opinion, a deer moves ____________________ (graceful) of all the animals.3. The politician spoke ________________ (loud) than was necessary.4. When we travel, my suitcase is always _______________ (heavy) than my husband’s.5. Mrs. Pedrido speaks _______________________(fluent) than her...
Đọc tiếp

Exercise 3: Complete the following sentences with the correct form of the adjective or adverb, comparative or superlative of the words provided.

1. This is ___________________________ (fancy) dress I own.

2. In my opinion, a deer moves ____________________ (graceful) of all the animals.

3. The politician spoke ________________ (loud) than was necessary.

4. When we travel, my suitcase is always _______________ (heavy) than my husband’s.

5. Mrs. Pedrido speaks _______________________(fluent) than her husband, but her daughter speaks _______________________ (fluent) of the whole family.

6. Annie usually gets up ________________(early) than her sister.

7. Bonnie works ___________________(hard) of all the employees in the office.

8. Judy goes to the library ____________________ (often) than I do.

8. This is _____________________ (bad) movie I have ever seen.

10. Shaun sings even __________________(beautiful) than her mother, who is a famous opera star. In fact, she has ___________________ (beautiful) voice I’ve ever heard.

Exercise 4: Complete the second sentence using the word given, so that it has a similar meaning to the first sentence. Write between TWO AND FIVE WORDS in each gap.

1. I have never watched a better movic than this one.  EVER

=> This is the ______________________________

2. Nobody has ever been this far into the desert.          THE

=> This is ________________________has ever been into the desert. THE

3. I was told that Ellie was the most industrious student in the class.

=> I was told that ______________________ than Ellie.    NO

4. This is the oldest palace in this urban area.

=> This _____________________ the others in this urban areas.  THAN

5. The paiting Ruby colored is the worst one you can imagine.

=> You can’t imagine __________________than Ruby colored.

PART C: EXTRA EXERCISE – READING

Exercise 1: Answer these following questions.

Last week Nick and some of his classmates went to the countryside. They went to visit a farm of Nick’s uncle.

They left early in the morning and went there by bus. Nick’s uncle, Mr. Brown met them at the bus stop and took them to his farm. Uncle Brown showed them the field of wheat and vegetables where some tractors were running up and down, ploughing and breaking soil, distributing manure and planting potatoes.

After lunch, they all went for a walk. In the large yard of the farm, they saw some farm machines. Among them is the biggest machine which is called a combine harvester. They were told that this machine can cut and thresh corn at the same time.

In the afternoon, they went to the place where cattle such as horses, sheep and cows were raised. They were very excited to see how cows were milked by the workers there. Uncle Brown also spoke about many interesting things in the countryside. After having some fruits and cakes, they said goodbye and went home.

1. What does his uncle grow on his farm?

___________________________________________________

2. What can a tractor do?

___________________________________________________

3. What is typical of a combine harvester?

___________________________________________________

4. Which kinds of cattle are raised in Uncle Brown’s farm?

___________________________________________________

Exercise 2: Fill out the table below and note them down on your Vocabulary-Grammar notebook.

New words

Definition

Example

Synonym

Antonym

Tractor

 

 

 

 

Plough

 

 

 

 

Manure

 

 

 

 

Thresh

 

 

 

 

 

1
12 tháng 9 2021

Exercise 3: Complete the following sentences with the correct form of the adjective or adverb, comparative or superlative of the words provided.

1. This is ________the fanciest___________________ (fancy) dress I own.

2. In my opinion, a deer moves ______the most gracefully______________ (graceful) of all the animals.

3. The politician spoke _________louder_______ (loud) than was necessary.

4. When we travel, my suitcase is always ________heavier_______ (heavy) than my husband’s.

5. Mrs. Pedrido speaks __more fluently_____________________(fluent) than her husband, but her daughter speaks _______the most fluently________________ (fluent) of the whole family.

6. Annie usually gets up _________earlier_______(early) than her sister.

7. Bonnie works __________the hardest_________(hard) of all the employees in the office.

8. Judy goes to the library _________more often___________ (often) than I do.

8. This is _________the worst____________ (bad) movie I have ever seen.

10. Shaun sings even _______more beautifully___________(beautiful) than her mother, who is a famous opera star. In fact, she has _____the most beautiful______________ (beautiful) voice I’ve ever heard.

Exercise 4: Complete the second sentence using the word given, so that it has a similar meaning to the first sentence. Write between TWO AND FIVE WORDS in each gap.

1. I have never watched a better movic than this one.  EVER

=> This is the ____best movie I have ever watched__________________________

2. Nobody has ever been this far into the desert.          THE

=> This is _____the farthest someone___________________has ever been into the desert. THE

3. I was told that Ellie was the most industrious student in the class.

=> I was told that ____no student in the class is more industrious______________ than Ellie.    NO

4. This is the oldest palace in this urban area.

=> This ______is the older palace than_______________ the others in this urban areas.  THAN

5. The paiting Ruby colored is the worst one you can imagine.

=> You can’t imagine ______a worse painting ____________than Ruby colored.

PART C: EXTRA EXERCISE – READING

Exercise 1: Answer these following questions.

Last week Nick and some of his classmates went to the countryside. They went to visit a farm of Nick’s uncle.

They left early in the morning and went there by bus. Nick’s uncle, Mr. Brown met them at the bus stop and took them to his farm. Uncle Brown showed them the field of wheat and vegetables where some tractors were running up and down, ploughing and breaking soil, distributing manure and planting potatoes.

After lunch, they all went for a walk. In the large yard of the farm, they saw some farm machines. Among them is the biggest machine which is called a combine harvester. They were told that this machine can cut and thresh corn at the same time.

In the afternoon, they went to the place where cattle such as horses, sheep and cows were raised. They were very excited to see how cows were milked by the workers there. Uncle Brown also spoke about many interesting things in the countryside. After having some fruits and cakes, they said goodbye and went home.

1. What does his uncle grow on his farm?

______He grows wheat, vegetables and potatoes._____________________________________________

2. What can a tractor do?

________It can plough and break soil, distribute manure and plant potatoes.___________________________________________

3. What is typical of a combine harvester?

_____A combine harvester can cut and thresh corn at the same time. ______________________________________________

4. Which kinds of cattle are raised in Uncle Brown’s farm?

______That cattle such as horses, sheep and cows are raised in Uncle Brown's farm._____________________________________________

4 tháng 3 2020

School days are the happiest of my life.

Who is better, Tom or Tim?

The Mekong River is the longest river in Vietnam.

It is the modernest building in this city.

Mercury is the smallest member of the sun's family. It is only 3.100 miles across. It is also the sun's swiftest planet. Its yearly journey round the sun is only 85 days. Mercury always keeps one side towards the sun. On this side it is always day, on the other side always night. We only see the lighted side. Mercury appears to us like a yellowish orange star. The nearest planet to the sun, it is always seen near the sun, either just before sunrise or soon after sunset. People sometimes...
Đọc tiếp

Mercury is the smallest member of the sun's family. It is only 3.100 miles across. It is also the sun's swiftest planet. Its yearly journey round the sun is only 85 days.

Mercury always keeps one side towards the sun. On this side it is always day, on the other side always night. We only see the lighted side.

Mercury appears to us like a yellowish orange star. The nearest planet to the sun, it is always seen near the sun, either just before sunrise or soon after sunset. People sometimes call mercury the morning star or evening star.

Mercury is half the size of the earth. Because it is much lighter, it has much less gravity. If you can visit Mercury in a spaceship, you will find it a strange world. Its low gravity makes you feel very light. If your weight on earth is 100 pounds, your weight on Mercury is only 27 pounds. Looking at the sun from Mercury, you can see that it's much more brilliant than it is seen from the earth. And the yellow centre of the sun appears three times bigger from Mercury.

On its lighted side, Mercury's temperature is about 300 degrees centigrate. But the dark side is extremely cold, but 150 degrees below zero so mercury is probably the coldest as well as the hottest of the planets.

21. A. Mercury is .......

A. the sun's fastest planet B. the coldest planet

C. the hottest planet D. all are correct

22. We cannot see the dark side of Mercury because .......

A. it moves very fast.

B. it always appears just before sunrise or soon after sunset.

C. it always keeps one side towards the sun.

D. it is too far for us to see.

23. When can we see Mercury? - We can see it ......

A. just before the sunset

B. just before sunrise

C. after the sunset

D. both A and C are correct

24. Why do we weigh much on the earth than on Mercury? - Because .......

A. Mercury is nearer to the sun. B. Mercury has got less gravity than the earth.

C. Mercury is much hotter. D. none are correct.

25. Why does the sun look bigger when it is seen from Mercury?

- Because .......

A. Mercury is the smallest planet of the sun.

B. Mercury is nearer to the sun.

C. Mercury is a light planet.

D. It only takes Mercury 88 days to move round the sun.

Chọn đáp án và giải thích chi tiết

1
14 tháng 8 2020

1/ swift= fast=> A

2/ Mercury always keeps one side towards the sun=> C

3/ The nearest planet to the sun, it is always seen near the sun, either just before sunrise or soon after sunset => B

4/ Because it is much lighter, it has much less gravity. => B

5/ B bởi gần thì nhìn mới to chứ :v

15 tháng 7 2021

1. more crowded than

2. the most romantic

3. more expensive than

4. the most famous

5. the biggest

6. more interesting than

7. hotter than

8. the most beautiful

15 tháng 7 2021

1 more crowded than

2 the most romantic

3 more expensive than

4 the most famous

5 the biggest

6 more interesting than

7 hotter than

8 the most beautiful

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50. The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth. By studying other stars, astronomers can predict what the rest of...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.

By studying other stars, astronomers can predict what the rest of the Sun’s life will be like. About five billion years from now, the core of the Sun will shrink and become hotter. The surface temperature will fall. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the Sun will expand approximately 35 million miles, about the distance to Mercury, which is the closest planet to the Sun. The Sun will then be a red giant star. Temperatures on the Earth will become too high for life to exist.

Once the Sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the Earth, it will become a white dwarf star. The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf.

After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface.

The Sun will become a black dwarf when .

A. the outer regions of the Sun expand       

B. it has used up all its fuel as a white dwarf

C. the Sun moves nearer to the Earth          

D. the core of the Sun becomes hotter

1
31 tháng 3 2019

Đáp án B
“After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf”

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.     The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.     By studying other stars, astronomers can predict what the...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

    The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.

    By studying other stars, astronomers can predict what the rest of the Sun’s life will be like. About five billion years from now, the core of the Sun will shrink and become hotter. The surface temperature will fall. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the Sun will expand approximately 35 million miles, about the distance to Mercury, which is the closest planet to the Sun. The Sun will then be a red giant star. Temperatures on the Earth will become too high for life to exist.

    Once the Sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the Earth, it will become a white dwarf star. The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf.

    After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface.

The Sun will become a black dwarf when ___.

A. the outer regions of the Sun expand

B. it has used up all its fuel as a white dwarf

C. the Sun moves nearer to the Earth

D. the core of the Sun becomes hotter

1
25 tháng 8 2019

Đáp án B

“After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf”