Exercise 37. You will hear a conversation between Bernard and Alice...">
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13 tháng 10 2021

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Read the situation and write sentences with It's time + clause (somebody did something).1. You think the children should be in bed. It’s already 11 o’clock.___________________________________________________________________________________2. You haven’t had a holiday for a very long time. You need one now.___________________________________________________________________________________3. You’re waiting for Mary. She is late. Why isn’t she here...
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Read the situation and write sentences with It's time + clause (somebody did something).

1. You think the children should be in bed. It’s already 11 o’clock.

___________________________________________________________________________________

2. You haven’t had a holiday for a very long time. You need one now.

___________________________________________________________________________________

3. You’re waiting for Mary. She is late. Why isn’t she here yet?

___________________________________________________________________________________

4. You’re sitting on a train waiting for it to leave the station. It’s already five minutes late.

___________________________________________________________________________________

5. You enjoy having parties. You haven’t had one for a long time.

___________________________________________________________________________________

6. The company you work for is badly run. You think there should be some changes.

___________________________________________________________________________________

7. It’s 10 o’clock and Tim is still in bed. You think he should get up now.

___________________________________________________________________________________

8. You want your parents to stop treating Tommy like a child. He’s 18 years old.

___________________________________________________________________________________

9. You and your friends enjoy the picnic. But it’s too late. You must go home immediately.

___________________________________________________________________________________

10. The windows are very dirty. You think they should be cleaned now.

___________________________________________________________________________________

1

1. It's time for the children to be in bed. It's already 11o'clock.

2. It's time for you to get a holiday. You need one now.

3. It's time for Mary to be here. She is late.

4. It's time for the train to leave the station. It's already 5 minutes late.

5. It's time for you to have a parties. 

6. It's time for your company to have some changes.

7. It's time for Tim to get up. It's already 10 o'clock.

8. It's time to stop treating Tommy a child. He's 18 years old.

9. It's time to go home immediately. I's to late.

10. It's time for the window to be cleaned. It's very dirty.

C. ReadingRead the passage below and decide whether the statements are TRUE or FALSE?Hello everyone. This is Alice. What do you often do when you have free time? There are a lot of leisure activities for young people to choose from. I myself adore doing DIYs. I have a craft kit with a lot of things to make crafts. Thanks to the craft kit, I can make some gifts for my friends and relatives. My mother taught me to make bracelets. Last week, I made a bracelet for my younger sister. I will make...
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C. Reading

Read the passage below and decide whether the statements are TRUE or FALSE?

Hello everyone. This is Alice. What do you often do when you have free time? There are a lot of leisure activities for young people to choose from. I myself adore doing DIYs. I have a craft kit with a lot of things to make crafts. Thanks to the craft kit, I can make some gifts for my friends and relatives. My mother taught me to make bracelets. Last week, I made a bracelet for my younger sister. I will make another for my close friend tomorrow. Making bracelet is my favorite leisure activity. I want to learn to make photo collages and frames, too. Therefore, I surf the internet for more information. Also, I have found a lot of useful Youtube videos teaching how to make scarfs and pullovers by wool. After watching them, I hope I will be able to make woolen clothes for my puppy.

1:Alice enjoys doing DIYs.A. True        B. False

 2: She doesn’t have any craft kits.A. True        B. False

3: Her mother told her how to make bracelets.A. True        B. False

4: Alice surf the internet for information on collage making.A. True        B. False

5: Alice has found lots of Youtube video on puppies.A. True        B. False

1

Read the passage below and decide whether the statements are TRUE or FALSE?

Hello everyone. This is Alice. What do you often do when you have free time? There are a lot of leisure activities for young people to choose from. I myself adore doing DIYs. I have a craft kit with a lot of things to make crafts. Thanks to the craft kit, I can make some gifts for my friends and relatives. My mother taught me to make bracelets. Last week, I made a bracelet for my younger sister. I will make another for my close friend tomorrow. Making bracelet is my favorite leisure activity. I want to learn to make photo collages and frames, too. Therefore, I surf the internet for more information. Also, I have found a lot of useful Youtube videos teaching how to make scarfs and pullovers by wool. After watching them, I hope I will be able to make woolen clothes for my puppy.

1:Alice enjoys doing DIYs.       A. True        B. False

 2: She doesn’t have any craft kits.   A. True        B. False

3: Her mother told her how to make bracelets.   A. True        B. False

4: Alice surf the internet for information on collage making.   A. True        B. False

5: Alice has found lots of Youtube video on puppies.   A. True        B. False

X. Rewrite the following sentences, using the provided word keep meaning as that of the root one.33. He suggested visiting Moc Chau to learn about Thai and H'mong people.=> What about________________________________________________34. They believe that touching the head of a Buddha statue is a sign of disrespect.=> It ________________________________________________________XI. Complete the second sentence so that it has a similar meaning to the first sentence, using the word in capital.37....
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X. Rewrite the following sentences, using the provided word keep meaning as that of the root one.

33. He suggested visiting Moc Chau to learn about Thai and H'mong people.

=> What about________________________________________________

34. They believe that touching the head of a Buddha statue is a sign of disrespect.

=> It ________________________________________________________

XI. Complete the second sentence so that it has a similar meaning to the first sentence, using the word in capital.

37. There has been a slight drop in the number of people using public transport. (SLIGHTLY)

=> ________________________________________________________

38. Revising for exams takes up all my time at the moment. (BUSY)

=> ________________________________________________________

39. There was an increased demand for travel, so the government decided to invest in building the very first metro system. (AS)

=> ________________________________________________________

40. I don't know much about historical events, so I can't help her with her history homework. (IF)

=> _____________________________________________________

0
Chọn câu đúng ngữ pháp và sát nghĩa nhất với thông tin đã cho Câu 1:I don’t have time. I can’t finish my work.A. I do not have time enough to finish my work.B. I do have enough time to finish my work.C. I don’t have enough time to finish my work.Câu 2:Her result this semester is good. Her parents are proud of her.A. Her result in this semester is enough good for her parents to be proud of her.B. Her result in this semester is good enough for her parents to be proud of...
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Chọn câu đúng ngữ pháp và sát nghĩa nhất với thông tin đã cho

 Câu 1:I don’t have time. I can’t finish my work.

A. I do not have time enough to finish my work.

B. I do have enough time to finish my work.

C. I don’t have enough time to finish my work.

Câu 2:Her result this semester is good. Her parents are proud of her.

A. Her result in this semester is enough good for her parents to be proud of her.

B. Her result in this semester is good enough for her parents to be proud of her.

C. Her result in this semester is bad enough for her parents to be proud of her.

Câu 3:The weather is nice. My family can go on a picnic.

A. The weather is nice enough for my family to go on a picnic.

B. The weather is not nice enough for my family to go on a picnic.

C. The weather is bad enough for my family to go on a picnic

 Câu 4:He didn’t speak loud. We couldn’t catch any information.

A. He did not speak enough loud for us to catch any information.

B. He not speak loud enough for us to catch any information.

C. He didn’t speak loud enough for us to catch any information

 Câu 5:I have money. I can afford this laptop.

A. I have money enough to buy this laptop.

B. I have enough money to buy this laptop.

C. I have enough money to sell this laptop.

Câu 6:John runs fast. He can win the race.

A. John runs fast enough to win the race.

B. John runs enough fast to win the race.

C. John runs slow enough to win the race.

Câu 7 :She is old. She can make her own decision.

A. She is not young enough to make her own decision.

B. She is young enough to make her own decision.

C. She is old enough to decide for herself.

Làm giúp mình với nhé mn . 3 người nhanh và đứng nhất mình tick cho

2
8 tháng 10 2021

1)a

2)b

3)a

4)c

5)b

6)a

7)c

câu 1 mình bấm Google dịch nó để là câu C . Mình cũng nghĩ là câu A đúng nữa

13 tháng 4 2021

27. which => who

28. was => were

29. for => on

30. cooker => cook

13 tháng 4 2021

1I thought I recognized the assistant which served us. => who

2) The twentieth century was the time when there was a lot of important events.  => were

3) Tom has got the job. You must congratulate him for his success. => on

4) The cooker who is in the kitchen doesn't work anymore.=> cook

*Nhanh tay vch

[1-4] Rewrite the following sentences, using the provided word to keep meaning as that of the root one.1. It's exciting for me to learn that I can come to visit my friend in Phu Yen next month.=> I am……………………………………………………………………………2. Those children need to be taught about how Vietnam has transformed itself.=> It is……………………………………………………………………………3. She was so rude to shout at his face...
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[1-4] Rewrite the following sentences, using the provided word to keep meaning as that of the root one.

1. It's exciting for me to learn that I can come to visit my friend in Phu Yen next month.

=> I am……………………………………………………………………………

2. Those children need to be taught about how Vietnam has transformed itself.

=> It is……………………………………………………………………………

3. She was so rude to shout at his face in the department store.

=> It was ………………………………………………………………………

4. My father was pleased when he learned that I had passed the entrance exam to high school.

=> My father…………………………………………………...………………

[5-8] Complete the second sentence so that it has a similar meaning to the first sentence, using the word in capital.

5. He was so brave that he could tell her what he thought about her. (IT)

=>…………………………………………………………………………………

6. Your bad news upsets me very much. (SORRY)

=>…………………………………………………………………………………

7. When will you book the flight for your trip to Vietnam? (BE)

=>……………………………………………………………………………..….

8. I'm interested in the news about ancient towns. (FIND)

=>……………………………………………………………………………..….

[9-10] Mark the letter A, B, c or D to indicate the word(s) OPPOSITE in meaning to the bold word(s) in each of the following questions.

9. If we had taken his sage advice, we wouldn't be in so much trouble now.

A. unwilling            B. clever                   C. unwise     D. eager

10. When you put on clothing or make-up, you place it on your body in order to wear it.

A. take off               B. look after              C. wash up     D. get on

2

[1-4] Rewrite the following sentences, using the provided word to keep meaning as that of the root one.

1. It's exciting for me to learn that I can come to visit my friend in Phu Yen next month.

=> I am excited to learn that I can come to visit my friend in Phu Yen next month.

2. Those children need to be taught about how Vietnam has transformed itself.

=> It is important to teach those children about how Vietnam has transformed itself.

3. She was so rude to shout at his face in the department store.

=> It was rude of her to shout at his face in the department store.

4. My father was pleased when he learned that I had passed the entrance exam to high school.

=> My father was pleased to learn that I had passed the entrance exam to high school.

[5-8] Complete the second sentence so that it has a similar meaning to the first sentence, using the word in capital.

5. He was so brave that he could tell her what he thought about her. (IT)

=> It was brave of him to tell her what he thought about her.

6. Your bad news upsets me very much. (SORRY)

=> I am sorry to hear your bad news.

7. When will you book the flight for your trip to Vietnam? (BE)

=> When will the flight for your trip to Vietnam be booked?

8. I'm interested in the news about ancient towns. (FIND)

=> I find the news about ancient towns interesting.

[9-10] Mark the letter A, B, c or D to indicate the word(s) OPPOSITE in meaning to the bold word(s) in each of the following questions.

9. If we had taken his sage advice, we wouldn't be in so much trouble now.

A. unwilling            B. clever                   C. unwise     D. eager

10. When you put on clothing or make-up, you place it on your body in order to wear it.

A. take off               B. look after              C. wash up     D. get on

1. Make a question for each of the underlined phrases in the following sentences:1. Their guests left for home because it was very late.=> ………………………………………………………………………………………………………………………………………2. I have to tidy the living room.=> ………………………………………………………………………………………………………………………………………3. The secretary...
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1. Make a question for each of the underlined phrases in the following sentences:

1. Their guests left for home because it was very late.

=> ………………………………………………………………………………………………………………………………………

2. I have to tidy the living room.

=> ………………………………………………………………………………………………………………………………………

3. The secretary gave Mr. Green a lot of information.

=> ………………………………………………………………………………………………………………………………………

4. The two men returned to the office at three o’clock.

=> ………………………………………………………………………………………………………………………………………

5. You ought to put the rug between the armchair and the couch.

=> ………………………………………………………………………………………………………………………………………

6. My mother often goes to work by bus.

=> ………………………………………………………………………………………………………………………………………

7. Her sister bought four pairs of stockings yesterday.

=> ………………………………………………………………………………………………………………………………………

8. Mr. Tuan goes to Ha Noi three times a month.

=> ………………………………………………………………………………………………………………………………………

9. The name of that book by Mark Twain is Tom Sawver.

=> ………………………………………………………………………………………………………………………………………

10. She had to wear glasses at the age of eleven.

=> ………………………………………………………………………………………………………………………………………

2. Rewrite the following sentences: (1.5 ms)

1. “Please give Tim his report card for the first semester, Mrs Green.”

=> Miss Jackson told.........................................................................................................................

2. “Tim should spend more time on his Spanish pronunciation”.

=> Miss Jackson said ........................................................................................................................            

3. No one has signed this cheque yet.

=> This cheque...................................................................................................................................

4. Janet is a better cook than Tom.

=> Tom can’t.....................................................................................................................................

5. No one helped us finish this homework.

=> We finished.................................................................................................................................. 

3. Write a description of Hoa's living room. Use the sets of words and phrases provided:

1. This / Hoa’s / living room.

=> ………………………………………………………………………………………………………………………………………

2. There / rug / front of / fireplace.

=> ………………………………………………………………………………………………………………………………………

3. A dog / lying / rug.

=> ………………………………………………………………………………………………………………………………………

4. On the fireplace / there / mirror.

=> ………………………………………………………………………………………………………………………………………

5. There / some pictures / wall / near / mirror.

=> ………………………………………………………………………………………………………………………………………

6. The TV set / be / shelf / next / lamp.

=> ………………………………………………………………………………………………………………………………………

7. There / be / another lamp / near / sofa.

=> ………………………………………………………………………………………………………………………………………

8. Near / lamp / be / the telephone.

=> ………………………………………………………………………………………………………………………………………

9. There / plant / behind / sofa / front / window.

=> ………………………………………………………………………………………………………………………………………

10. The stereo / be / between / sofa / television.

=> ………………………………………………………………………………………………………………………………………

4. Complete the second sentence so that it has similar meaning to the first:

1. Driving too fast is dangerous.

=> It’s................................................................................................................................................

2. He isn’t strong. He can’t lift such a heavy box.

=> He is too.......................................................................................................................................

3. They plan to invite her for dinner tonight.

=> They are .......................................................................................................................................

4. She can’t speak. She can’t hear.

=> She can neither ............................................................................................................................

5. The children liked to swim in the rain.

=> The children enjoyed....................................................................................................................

6. How carefully he drives!

=> What ............................................................................................................................................

7. We must cover electrical sockets because children fay to put anything into them.

=> Electrical sockets .........................................................................................................................

8. Nobody helps her with the housework.

=> She does ......................................................................................................................................

9. He missed the first bus. He got up late.

=> Because .......................................................................................................................................

10. He is very lazy, so he can’t get good marks.

=> He isn’t......................................................................................................................................... 

9
3 tháng 7 2016

1. Make a question for each of the underlined phrases in the following sentences:

1. Their guests left for home because it was very late.

=> Why they guests left home ?

2. I have to tidy the living room.

=> What do you have to ?

3. The secretary gave Mr. Green a lot of information.

=> How much information did the seceretary give Mr.Green?

4. The two men returned to the office at three o’clock.

=> What time did the two men return to the office ?

5. You ought to put the rug between the armchair and the couch.

=> Where do you ought to put the rug ?

6. My mother often goes to work by bus.

=> How does your mother go to work ?

7. Her sister bought four pairs of stockings yesterday.
=> How many pairs of stockings did her sister buy yesterday ?

8. Mr. Tuan goes to Ha Noi three times a month.

=> How long does Mr . Tuan go to Ha Noi?

9. The name of that book by Mark Twain is Tom Sawver.

=> ……What is the name of that book by Mark Twain ?

10. She had to wear glasses at the age of eleven.

=> ……How old did she have to wear glasses?

 
3 tháng 7 2016

1. Make a question for each of the underlined phrases in the following sentences:

1. Their guests left for home because it was very late.

=> Why they guests left home ?

2. I have to tidy the living room.

=> What do you have to ?

3. The secretary gave Mr. Green a lot of information.

=> How much information did the seceretary give Mr.Green?

4. The two men returned to the office at three o’clock.

=> What time did the two men return to the office ?

5. You ought to put the rug between the armchair and the couch.

=> Where do you ought to put the rug ?

6. My mother often goes to work by bus.

=> How does your mother go to work ?

7. Her sister bought four pairs of stockings yesterday.
=> How many pairs of stockings did her sister buy yesterday ?

8. Mr. Tuan goes to Ha Noi three times a month.

=> How long does Mr . Tuan go to Ha Noi?

9. The name of that book by Mark Twain is Tom Sawver.

=> What is the name of that book by Mark Twain ?

10. She had to wear glasses at the age of eleven.

=> How old did she have to wear glasses?

1.Đọc đoạn văn và chia động từ trong ngoặc cho phù hợpHarold Black’s a famous pianist. He (1).....................(give) two or three concerts every week. He (2).....................(travel) a lot and this week he’s in New York. He (3).....................(stay) at an expensive hotel. He’s at his hotel now. He (4).....................(have) his breakfast in the dining room. He (5).....................(drink) a cup of coffee and he (6).....................(read) a...
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1.Đọc đoạn văn và chia động từ trong ngoặc cho phù hợp

Harold Black’s a famous pianist. He (1).....................(give) two or three concerts every week. He (2).....................(travel) a lot and this week he’s in New York. He (3).....................(stay) at an expensive hotel. He’s at his hotel now. He (4).....................(have) his breakfast in the dining room. He (5).....................(drink) a cup of coffee and he (6).....................(read) a newspaper. Harold’s always very busy. He (7).....................(play) the piano regularly. He (8).....................(practice) for four hours everyday, He (9).....................(go) to bed late and he always (10).....................(get up) early. But he sometimes (11).....................(get) dressed too quickly and this morning he (12).....................(wear) one blue sock and one red one!

2

* mình giải thích ở bên dưới bài làm nhé!

1.Đọc đoạn văn và chia động từ trong ngoặc cho phù hợp

Harold Black’s a famous pianist. He (1)..............gives.......(give) two or three concerts every week. He (2)...........travels..........(travel) a lot and this week he’s in New York. He (3).........is staying............(stay) at an expensive hotel. He’s at his hotel now. He (4)......is having..............(have) his breakfast in the dining room. He (5).............is drinking........(drink) a cup of coffee and he (6)........is reading.............(read) a newspaper. Harold’s always very busy. He (7).........plays............(play) the piano regularly. He (8).......practises..............(prace) for four hours everyday, He (9)...........doesn't go..........(go) to bed late and he always (10).........gets............(get up) early. But he sometimes (11).........gets............(get) dressed too quickly and this morning he (12)............is wearing.........(wear) one blue sock and one red one!

* Những câu :1,2,7,8,9,11,12 chia về thì hiện tại đơn vì là những hành động thường xuyên xảy ra và lặp lại ở hiện tại cũng như trong tương lai 

* Nhnugwx câu còn lại chia to be + V-ing vì là hiện tại tiếp diễn, diễn tả những hành động đang xảy ra.

12 tháng 4 2021

1.Đọc đoạn văn và chia động từ trong ngoặc cho phù hợp

Harold Black’s a famous pianist. He (1) gives (give) two or three concerts every week. He (2) travels (travel) a lot and this week he’s in New York. He (3) is staying (stay) at an expensive hotel. He’s at his hotel now. He (4) is having (have) his breakfast in the dining room. He (5) is drinking (drink) a cup of coffee and he (6) is reading (read) a newspaper. Harold’s always very busy. He (7) plays (play) the piano regularly. He (8) practises (prace) for four hours everyday, He (9) goes (go) to bed late and he always (10) gets up (get up) early. But he sometimes (11) gets (get) dressed too quickly and this morning he (12) is wearing (wear) one blue sock and one red one!

Ôn tập hóa 8 – nghỉ dịch Covid Câu 1: Cho các oxit sau: CO2, MgO, Al2O3 và Fe3O4. Trong các chất trên chất nào có tỉ lệ Oxi nhiều hơn cả? A. CO2 B. MgO C. Al2O3 D. Fe3O4 Câu 2: trong Nông nghiệp người ta có thể dùng Đồng (II) sunfat như một loại phân bón vi lượng để bón ruộng, làm tăng năng suất cây trồng. Nếu dùng 8 gam chất này thì có thể đưa vào đất bao nhiêu gam...
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Ôn tập hóa 8 – nghỉ dịch Covid

Câu 1: Cho các oxit sau: CO2, MgO, Al2O3 và Fe3O4. Trong các chất trên chất nào có tỉ lệ Oxi nhiều hơn cả?
A.
CO2 B. MgO C. Al2O3 D. Fe3O4

Câu 2: trong Nông nghiệp người ta có thể dùng Đồng (II) sunfat như một loại phân bón vi lượng để bón ruộng, làm tăng năng suất cây trồng. Nếu dùng 8 gam chất này thì có thể đưa vào đất bao nhiêu gam đồng?
A. 3,4 g B. 3,2 g C. 3,3 g D. 4,5 g

Câu 3: Trong các loại phân đạm sau: NH4NO3, (NH4)2SO4, (NH2)2CO. Phân đạm nào có tỉ lệ % nito cao nhất?
A. NH4NO3, B. (NH2)2CO C. (NH4)2SO4

Câu 4: Cho các oxit sắt sau: FeO, Fe2O3, Fe3O4 Trong các oxit trên oxit nào có tỉ lệ nhiều sắt hơn cả?
A. Fe2O3 B. FeO C. Fe3O4

Câu 5: Thành phần phần trăm về khối lượng các nguyên tố Đồng và Oxi trong CuO lần lượt là:
A. 70% và 30% B. 79% và 21%
C. 60% và 40% D. 80% và 20%

Câu 6: Thành phần phần trăm về khối lượng các nguyên tố Đồng, Lưu huỳnh và Oxi trong CuSO4 lần lượt là:
A. 30%; 30% và 40% B. 25%; 25% và 50%
C. 40%; 20% và 40% D. Tất cả đều sai

Câu 7: Một hợp chất X có phân tử khối bằng 62 đvC. Trong phân tử của hợp chất nguyên tố O chiếm 25,8% về khối lượng, còn lại là nguyên tố Na. Số nguyên tử của O và Na có trong phân tử hợp chất lần lượt là:
A. 1 và 2 B. 2 và 4 C. 1 và 4 D. 2 và 2

Câu 8: Một oxit của Sắt có phân tử khối là 160 đvC, thành phần % về khối lượng của Oxi là 30%. Công thức phân tử của oxit sắt là:
A. Fe2O3 B . Fe3O4 C. FeO D. Fe3O2

Câu 9: khối lượng của kim loại R hóa trị II trong muối cacbonat chiếm 40%. Công thức hóa học của muối cacbonat là:
A. CaCO3 B. CuCO3 C. FeCO3 D. MgCO3

Câu 10: Một loại oxit đồng màu đen có khối lượng mol phân tử là 80g. Oxit này có thành phần % về khối lượng Cu là 80%. Công thức hóa học của đồng oxit là:
A. Cu2O B. Cu3O C. CuO2 D. CuO

Câu 11: Một hợp chất tạo bởi 2 nguyên tố P và O, trong đó oxi chiếm 43,64% về khối lượng, biết phân tử khối là 110. Công thức hóa học của hợp chất là:
A. P2O5 B. P2O3 C. PO D. P2O

Câu 12: Trong một oxit của nito, cứ 7 gam N kết hợp với 16g O. Công thức hóa học đơn giản oxit của nito là:
A. NO B. N2O5 C. NO2 D. N2O

Câu 13: Một oxit của kim loại M có hóa trị n, trong đó thành phần % về khối lượng của O chiếm 30%. Biết hóa trị cao nhất của kim loại là III. Oxit của kim loại này chỉ có thể là:
A. CaO B. Fe2O3 C. MgO D. CuO

Câu 14: X là hợp chất khí với Hidro của phi kim S, trong hợp chất này S chiếm 94,12%, H chiếm 5,88%. X là công thức hóa học nào sau đây. Biết dX/H2 = 17

A. HS B. H2S C. H4S D. H6S2

Câu 15: Đốt cháy hoàn toàn 1,37 gam một hợp chất X cho 0,392 lít CO2 (đktc) và 2,32 gam SO2. CTHH cảu X là:

A. CS B. CS2 C. CS3 D. C2S5

Câu 16:Đốt cháy0,12 gam magie trong không khí, thu được 0,2 gam magie oxit. CTHH của magie oxit là:

A. MgO B. Mg2O C. MgO2 D. Mg2O2

Câu 17: Một nguyên tử M kết hợp với 3 nguyên tử H tạo thành hợp chất X. Trong phân tử X, khối lượng H chiếm 17,65%. Công thức đơn giản của X là:

A. PH3 B. CH3 C. NH3 D.tất cả đều sai.

Câu 18: Một hợp chất Y có nguyên tố cacbon chiếm 80% và 20% là hidro. Tỉ khối của Y só với hidro bằng 15. Y là công thức đơn giản nào sau đây:

A. CH3 B. C2H8 C. C2H4 D. C2H6

Câu 19: Một oxit có thành phần là mS:mO = 24:36. Công thức hóa học đơn giản của oxit là:

A. SO3 B. SO2 C. SO4 D. S2O4

Câu 20: Một hợp chất có thành phần là mC : mH = 48:10. Công thức hóa học đơn giản của hợp chất là:

C4H4 B. C4H10 C. C2H6 D. C4H8

0
10 tháng 4 2020

Hùng Nguyễn Bày đặt khịa khịa

10 tháng 4 2020

Hùng Nguyễn Nói là đăng sai luôn đi lại còn ..... =.=

These days it is(o)………….......................to open a newspaper without POSSIBLE reading about the damage we are doing to the environment. The earth is being(1)………….....................and the future looks bad. THREAT What can each of us do? We cannot clean up our(2)…………......................rivers and seas overnight. POLLUTION Nor can we stop the(3)……………...................of plants and animals. But ...
Đọc tiếp

These days it is(o)………….......................to open a newspaper without POSSIBLE

reading about the damage we are doing to the environment.

The earth is being(1)………….....................and the future looks bad. THREAT

What can each of us do?

We cannot clean up our(2)…………......................rivers and seas overnight. POLLUTION

Nor can we stop the(3)……………...................of plants and animals. But APPEAR

we can stop adding to the problem while(4)………………................. .......... SCIENCE

search for answers, and laws are passed in nature’s(5)……………............... DEFEND

It may not be easy to change your lifestyle(6)…………….................., but COMPLETE

some steps are easy to take: cut down the amount of(7)………….................. DRIVE

you do or use as little plastic as possible. It is also easy to save energy,

which also reduces(8)…………….................bills. We must all make HOUSE

a personal (9)……………................... to work for the future of our planet if DECIDE

we want to (10)…………....................a better world for our grand- children. SURE

2
7 tháng 6 2017

These days it is(o)………….....impossible..................to open a newspaper without POSSIBLE

reading about the damage we are doing to the environment.

The earth is being(1)…………....threatened.................and the future looks bad. THREAT

What can each of us do?

We cannot clean up our(2)………….....polluted.................rivers and seas overnight. POLLUTION

Nor can we stop the(3)……………dis...................of plants and animals. But APPEAR

we can stop adding to the problem while(4)………………scientists................. .......... SCIENCE

search for answers, and laws are passed in nature’s(5)……………defense............... DEFEND

It may not be easy to change your lifestyle(6)……………completely.................., but COMPLETE

some steps are easy to take: cut down the amount of(7)…………...driving............... DRIVE

you do or use as little plastic as possible. It is also easy to save energy,

which also reduces(8)……………household.................bills. We must all make HOUSE

a personal (9)…………….decision.................. to work for the future of our planet if DECIDE

we want to (10)…………ensure....................a better world for our grand- children. SURE

7 tháng 6 2017

These days it is(o)…………impossible.......................to open a newspaper without POSSIBLE

reading about the damage we are doing to the environment.

The earth is being(1)…………threatened.....................and the future looks bad. THREAT

What can each of us do?

We cannot clean up our(2)…………polluted......................rivers and seas overnight. POLLUTION

Nor can we stop the(3)………disappearance……...................of plants and animals. But APPEAR

we can stop adding to the problem while(4)…………scientists……................. .......... SCIENCE

search for answers, and laws are passed in nature’s(5)………defense……............... DEFEND

It may not be easy to change your lifestyle(6)…………completely….................., but COMPLETE

some steps are easy to take: cut down the amount of(7)………driving….................. DRIVE

you do or use as little plastic as possible. It is also easy to save energy,

which also reduces(8)………household…….................bills. We must all make HOUSE

a personal (9)…………decision…................... to work for the future of our planet if DECIDE

we want to (10)…………ensure....................a better world for our grand- children. SURE