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39. As he passed the slope, he noticed a lane leading down towards the river. (CLOSEST)A. signB. postC. tankD. road40.Numerous attempts were made to restore the broken antique vase. (OPPOSITE) A. strongB. manyC. fewD. weak41. Her suggestions seeked to remedy the SHORTCOMINGS in the project. (CLOSEST) *A. weaknessesB. curiosityC. enthusiasmD. strengths42. He responded that he didn't want to decide anything too soon. (OPPOSITE) A. questionedB. repliedC. increasedD. reduced44. The more...
Đọc tiếp

39. As he passed the slope, he noticed a lane leading down towards the river. (CLOSEST)

A. sign

B. post

C. tank

D. road

40.Numerous attempts were made to restore the broken antique vase. (OPPOSITE) 

A. strong

B. many

C. few

D. weak

41. Her suggestions seeked to remedy the SHORTCOMINGS in the project. (CLOSEST) *

A. weaknesses

B. curiosity

C. enthusiasm

D. strengths

42. He responded that he didn't want to decide anything too soon. (OPPOSITE) 

A. questioned

B. replied

C. increased

D. reduced

44. The more participation there will be in the discussion, the more objective the issue becomes. (OPPOSITE)

A. acceptance

B. absence

C. confusion

D. celebration

45. My manager advised me not to rush to a conclusion about anything in the office. (CLOSEST)

A. judgement

B. engagement

C. perfection

D. introduction

46. The old man said his interests included anything adventurous or CHALLENGING. (OPPOSITE)

A. easy

B. social

C. reserved

D. difficult

47. The waters of river were harnessed for big hydro-electric power projects. (CLOSEST)

A. separated

B. exploited

C. removed

D. dismissed

48. The paintings are EXHIBITED in chronological sequence. (OPPOSITE)

A. expressed

B. displayed

C. concealed

D. restored

50. Known as A ONE-TRICK PONY in the office, William tried to learn more things and then became better. (OPPOSITE)

A. a careless person

B. a versatile person

C. a bad-tempered person

D. an economical person

1
20 tháng 12 2021

em cảm ơn ạ

20 tháng 12 2021

39. As he passed the slope, he noticed a lane leading down towards the river. (CLOSEST)

A. sign

B. post

C. tank

D. road

40.Numerous attempts were made to restore the broken antique vase. (OPPOSITE) 

A. strong

B. many

C. few

D. weak

41. Her suggestions seeked to remedy the SHORTCOMINGS in the project. (CLOSEST) *

A. weaknesses

B. curiosity

C. enthusiasm

D. strengths

42. He responded that he didn't want to decide anything too soon. (OPPOSITE) 

A. questioned

B. replied

C. increased

D. reduced

44. The more participation there will be in the discussion, the more objective the issue becomes. (OPPOSITE)

A. acceptance

B. absence

C. confusion

D. celebration

45. My manager advised me not to rush to a conclusion about anything in the office. (CLOSEST)

A. judgement

B. engagement

C. perfection

D. introduction

46. The old man said his interests included anything adventurous or CHALLENGING. (OPPOSITE)

A. easy

B. social

C. reserved

D. difficult

47. The waters of river were harnessed for big hydro-electric power projects. (CLOSEST)

A. separated

B. exploited

C. removed

D. dismissed

48. The paintings are EXHIBITED in chronological sequence. (OPPOSITE)

A. expressed

B. displayed

C. concealed

D. restored

50. Known as A ONE-TRICK PONY in the office, William tried to learn more things and then became better. (OPPOSITE)

A. a careless person

B. a versatile person

C. a bad-tempered person

D. an economical person

One day in 1848 a carpenter called Marshall, who worked in a saw mill on the American River in California, made a remarkable discovery. He noticed some bright yellow particles in the water, bent down to pick them up and took them to his partner, Mr. Sutter. This was the beginning of the Californian Gold Rush. Sutter was a Swiss who had come to America some years earlier to make his fortune. The Governor of California had given him permission to found a settlement in the Sacramento Valley and...
Đọc tiếp

One day in 1848 a carpenter called Marshall, who worked in a saw mill on the American River in California, made a remarkable discovery. He noticed some bright yellow particles in the water, bent down to pick them up and took them to his partner, Mr. Sutter. This was the beginning of the Californian Gold Rush. Sutter was a Swiss who had come to America some years earlier to make his fortune. The Governor of California had given him permission to found a settlement in the Sacramento Valley and his determination and energy had made him rich. He had built the mill in partnership with Marshall in order to make use of the abundant natural fresources of his land.

Sutter realized the importance of the discovery and decided to file a claim so that his right to the gold would be established. So he sent a man named Bennet to San Francisco to see the Governor. He warned Bennet not to tell anyone in case people came to the valley before his claim was recognised. Bennet could not keep secret but the people of San Francisco did not believe him at first. Then the editor of a weekly newspaper there, Sam Brannan, went to Sutter’s mill to make a report. When he came back he ran through the streets of the town shouting ‘Gold! Gold!’Within a month almost the entire population, then only 800 people, had gone to look for the precious metal. Soldiers deserted the army, sailors left their ships and men gave up their jobs so as not to miss the chance of becoming rich.

The news spread across America to Europe and thousands of people joined in the search. Those who went by ship had to sail round Cape Horn to reach California but some chose the overland route across America and wagon trains were formed for travellers to make the journey. Even then there were some who were prepared to cross the terrible desert of Death Valley in order to reach the gold a few days before the rest

The Gold Rush proved a disaster for Sutter himself. For years he tried to evict the prospectors from his property so that his family might enjoy the wealth of his land, but his busmess was ruined. The prospectors did a great deal of damage, and killed one of his sons, and at the end of his life he was a poor man who continually stopped people in the street to tell them that Gold is the Devil.

11. The story took place.........................

A. in the 19th century                         B. After World War I            

C. during World War I                       D. in the 18th century

12. Who was Marshall?

A. A Swiss                                          B. A carpenter

C. The Governor of California            D. A newspaper reporter

13. How did Marshall learn about the gold?

A. He found it in the water by accident.

B. His partner told him about it.

C. He found it when he was in Sacramento Valley to try his luck.

D. He got the information from a newspaper.

14. During the period of the Californian Gold Rush........................   .

A. Sutter went to California to make his fortune

B. Marshall built up a mill on the American River

C. Bennet was sent to San Francisco to see the Governor

D. Sam Brannan sent a reporter to Sacramento

15. Sutter became rich........................           

A. when he found gold                       B. before he found gold

C. before he came to California          D. in San Francisco

16. When Bennet told people there was gold in the Sacramento Valley, ........................

A. people rushed there immediately to look for gold

B. they did not believe him

C. Marshall was angry and fired him

D. he was punished for not keeping the secret

17. What was the population of San Francisco when the Gold Rush started?

A. 180 families                        B. 200 families                        C. 800 people              D. 1,800 people

18. How did people make the journey to California at that time?

A. They sailed round Cape Hom and then crossed the desert of Death Valley.

B. They crossed America by ưain.

C. They travelled across America on wagon trains.

D. All of the above.

19. Sutter didn’t enjoy the wealth of his land because.........................

A. he failed to get helping hands

B. he was denied the right to the gold

C. all his sbns were killed

D. his business was ruined

20. What do you think the story told us?

A. How to make a fortune with this precious metal

B. How gold was discovered in California

C. Gold does not always lead to happiness

D. Why some people do not like gold

0
One day in 1848 a carpenter called Marshall, who worked in a saw mill on the American River in California, made a remarkable discovery. He noticed some bright yellow particles in the water, bent down to pick them up and took them to his partner, Mr. Sutter. This was the beginning of the Californian Gold Rush. Sutter was a Swiss who had come to America some years earlier to make his fortune. The Governor of California had given him permission to found a settlement in the Sacramento Valley and...
Đọc tiếp

One day in 1848 a carpenter called Marshall, who worked in a saw mill on the American River in California, made a remarkable discovery. He noticed some bright yellow particles in the water, bent down to pick them up and took them to his partner, Mr. Sutter. This was the beginning of the Californian Gold Rush. Sutter was a Swiss who had come to America some years earlier to make his fortune. The Governor of California had given him permission to found a settlement in the Sacramento Valley and his determination and energy had made him rich. He had built the mill in partnership with Marshall in order to make use of the abundant natural fresources of his land.

Sutter realized the importance of the discovery and decided to file a claim so that his right to the gold would be established. So he sent a man named Bennet to San Francisco to see the Governor. He warned Bennet not to tell anyone in case people came to the valley before his claim was recognised. Bennet could not keep secret but the people of San Francisco did not believe him at first. Then the editor of a weekly newspaper there, Sam Brannan, went to Sutter’s mill to make a report. When he came back he ran through the streets of the town shouting ‘Gold! Gold!’Within a month almost the entire population, then only 800 people, had gone to look for the precious metal. Soldiers deserted the army, sailors left their ships and men gave up their jobs so as not to miss the chance of becoming rich.

The news spread across America to Europe and thousands of people joined in the search. Those who went by ship had to sail round Cape Horn to reach California but some chose the overland route across America and wagon trains were formed for travellers to make the journey. Even then there were some who were prepared to cross the terrible desert of Death Valley in order to reach the gold a few days before the rest

The Gold Rush proved a disaster for Sutter himself. For years he tried to evict the prospectors from his property so that his family might enjoy the wealth of his land, but his busmess was ruined. The prospectors did a great deal of damage, and killed one of his sons, and at the end of his life he was a poor man who continually stopped people in the street to tell them that Gold is the Devil.

11. The story took place.........................

A. in the 19th century                         B. After World War I            

C. during World War I                       D. in the 18th century

12. Who was Marshall?

A. A Swiss                                          B. A carpenter

C. The Governor of California            D. A newspaper reporter

13. How did Marshall learn about the gold?

A. He found it in the water by accident.

B. His partner told him about it.

C. He found it when he was in Sacramento Valley to try his luck.

D. He got the information from a newspaper.

14. During the period of the Californian Gold Rush........................   .

A. Sutter went to California to make his fortune

B. Marshall built up a mill on the American River

C. Bennet was sent to San Francisco to see the Governor

D. Sam Brannan sent a reporter to Sacramento

15. Sutter became rich........................           

A. when he found gold                       B. before he found gold

C. before he came to California          D. in San Francisco

16. When Bennet told people there was gold in the Sacramento Valley, ........................

A. people rushed there immediately to look for gold

B. they did not believe him

C. Marshall was angry and fired him

D. he was punished for not keeping the secret

17. What was the population of San Francisco when the Gold Rush started?

A. 180 families                        B. 200 families                        C. 800 people              D. 1,800 people

18. How did people make the journey to California at that time?

A. They sailed round Cape Hom and then crossed the desert of Death Valley.

B. They crossed America by ưain.

C. They travelled across America on wagon trains.

D. All of the above.

19. Sutter didn’t enjoy the wealth of his land because.........................

A. he failed to get helping hands

B. he was denied the right to the gold

C. all his sbns were killed

D. his business was ruined

20. What do you think the story told us?

A. How to make a fortune with this precious metal

B. How gold was discovered in California

C. Gold does not always lead to happiness

D. Why some people do not like gold

0
29 tháng 11 2019

20, Fill each gap in the passage with one word.

One (1) .....day........... John's father bought a computer for him. He thought it was a good replacement for John's typewriter, (2) .....which............ had broken down. John could use the computer to write essays. His father did (3) ........not...... expect that Jonh would (4) .....spend.......all his rime playing computer games on it, which was (5) .......what....... he did.

John neglected his studies and he actually (6).....failed........his examinations. When that happened, John realized that he had made a terrible (7) ...........mistake...... He began to use the computer mainly (8) .......for.........typing his essays. He only played computer (9).....only......in his time. As a (10) ............of this, he passed his final examinations

P/s: Chỉ đến được câu 9 thôi, câu 10 t không biết làm :))

Read the following passage and answer the questions. An Accident ''Let's race down the slope at the part!'', Tom said to Fred. The two boys went to the top of the slope, ''Ready, go!'', Tom yelled as the two boys cycled as fast as they could. The bicycles went down the slope at great speed. Then, the boys realised that they had lost control of the bicycles. They were going so fast that it was too dangerous to use the brakes. CRASH! BANG! The bicycles hit a curb and crashed into a fence and...
Đọc tiếp

Read the following passage and answer the questions.

An Accident

''Let's race down the slope at the part!'', Tom said to Fred. The two boys went to the top of the slope, ''Ready, go!'', Tom yelled as the two boys cycled as fast as they could. The bicycles went down the slope at great speed. Then, the boys realised that they had lost control of the bicycles. They were going so fast that it was too dangerous to use the brakes. CRASH! BANG! The bicycles hit a curb and crashed into a fence and a tree. The boys were in great pain. Luckily, some joggers saw what had happened and came to help. Someone called their parents who soon came to bring them home. Tom and Fred had learnt their lesson. Thay promised never to do something so dangerous again.

1. How did the bicycles go down the slope?

2. Why didn't Tom and Fred use the brakes?

3. Where did the bicycles crash?

4. How were Tom and Fred after crash?

5. Who bought Tom and Fred home?

1
4 tháng 3 2018

1. How did the bicycles go down the slope?

=>They went down the slope at great speed.

2. Why didn't Tom and Fred use the brakes?

=>Because they were going very fast and it was too dangerous to use the brakes.

3. Where did the bicycles crash?

=>The bicycles crashed into a fence and a tree.

4. How were Tom and Fred after crash?

=>They were in great pain.

5. Who bought Tom and Fred home?

=>Their parents did.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually...
Đọc tiếp

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

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.

In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca -Cola, the world - famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food. the microwave oven.

In paragraph 1, the word arduous is closest in meaning to _______.

A. constant

B. tough

C. specific

D. detailed

1
24 tháng 2 2017

Chọn B

Trong đoạn 1, từ “arduous” gần nghĩa _______.

A. liên tục

B. khó khăn

C. cụ thể

D. chi tiết

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the

correct answer to each of the questions.

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.

In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca – Cola, the world – famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food. the microwave oven.

In paragraph 1, the word arduous is closest in meaning to _______.

A. constant

B. tough

C. specific

D. detailed

1
5 tháng 12 2017

 

Chọn B

Trong đoạn 1, từ arduous (khó nhất) có nghĩa gần nhất với

    A. constant: kiên trì

    B. tough : khó                  

    C. specific : cụ thể            

    D. detailed: chi tiết

    => Đáp án B

 

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually...
Đọc tiếp

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

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.

In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca -Cola, the world - famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food. the microwave oven.

In paragraph 2, the word endeavor is closest in meaning to _______.

A. request

B. attempt

C. research

D. dream

1
1 tháng 9 2018

Chọn B

Trong đoạn 2, endeavor gần nghĩa _______.

A. yêu cầu

B. cố gắng

C. nghiên cứu

D. giấc mơ

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the

correct answer to each of the questions.

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.

In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca – Cola, the world – famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food. the microwave oven.

In paragraph 2, the word endeavor is closest in meaning to _______.

A. request

B. attempt

C. research

D. dream

1
4 tháng 1 2018

Chọn B

    Ở đoạn 2, từ “endeavor” ( nỗ lực)gần nghĩa nhất với?

    A. request : yêu cầu

    B. attempt : cố gắng 

    C. research : nghiên cứu                              

    D. dream: giấc mơ

    => endeavor~ attempt : cố gắng, nỗ lực

    => Đáp án B

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the

correct answer to each of the questions.

A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.

In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca – Cola, the world – famous carbonated soft drink.

Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food. the microwave oven.

The author uses Alexander Fleming as an example of ________.

A. a person who made an accidental scientific discovery 

B. one of the most famous inventors in history 

C. someone who became a millionaire from his invention 

D. a man who dedicated his life to medical science

1
30 tháng 8 2017

 

Chọn A

    Tác giả sử dụng Alexander Fleming làm ví dụ của ________.

    A. một người đã thực hiện một khám phá khoa học tình cờ

    B. một trong những nhà phát minh nổi tiếng nhất trong lịch sử

    C. một người trở thành triệu phú từ phát minh của mình

    D. một người đàn ông đã cống hiến cuộc đời mình cho khoa học y khoa

    Dẫn chứng: Scientists have also made crucial discoveries by accident when they were conducting experiments.      

    Tạm dịch: Các nhà khoa học cũng đã có những khám phá quan trọng một cách tình cờ khi họ đang tiến hành thí nghiệm.

ð Đáp án A