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B. Identify the one underlined word or phrase - A, B, C or D - that must be changed for the sentence to be correct.

1. The house painted more than three years ago. but I'm not going to have it done again for a while.

                          A                                                                         B        C         D

2. The stories what I've told you are all true.

               A       B     C                  D

3. According to the theory of relativity, nothing can travel faster as light.

            A                                       B                      C                       D

4. Could you tell me what the air conditioner use for?

       A                          B                                    C   D

5. Then the computer will ask you restart it.

       A               B                  C         D

6. Before you leave, please duplicate that file by make a copy on the CD-ROM.
                    A                                     B              C                D

7. The last payment shouldn't make until all the work has been completed and carefully checked. 

                                                   A                                      B              C                                    D

8. You'll see a copy before they're printed by the printer.

               A                                  B      C              D

9. We've been here only one day, but we've been taken three rolls of film.

        A       B                                   C                    D      

10. If the software is not compatible with the operating system, the computer may fail to function and  
                                           A                                                                               B                                                              
shut down without warning.
  C                               D

1
21 tháng 11 2021

1. The house painted => was painted more than three years ago. but I'm not going to have it done again for a while.

                          A                                                                         B        C         D

2. The stories what => which I've told you are all true.

               A       B     C                  D

3. According to the theory of relativity, nothing can travel faster as => than light.

            A                                       B                      C                       D

4. Could you tell me what the air conditioner use => is used for?

       A                          B                                    C   D

5. Then the computer will ask you restart => to restart it.

       A               B                  C         D

6. Before you leave, please duplicate that file by make => making a copy on the CD-ROM.
                    A                                     B              C                D

7. The last payment shouldn't make => be made until all the work has been completed and carefully checked. 

                                                   A                                      B              C                                    D

8. You'll see a copy before they're printed by the printer.

               A                                  B      C              D

9. We've been here only one day, but we've been taken three rolls of film.

        A       B                                   C                    D      

10. If the software is not compatible with the operating system, the computer may fail to function and  
                                           A                                                                               B                                                              
shut down without warning.
  C                               D

15 tháng 12 2021

A -> was painted (vì là bị động)

B -> which (ko có relative adverb nào dùng what)

C-> making (by Ving)

A -> shouldn't be made (bị động)

C -> shut down (tắt)

14 tháng 12 2018

Bài 1:Tìm và sửa lỗi sai.

1.Can you tell me where were you=> you were born?-Stockholm.

2.Computers are often used to control, adjustment=> adjust, and correct complex industrial operation.

3.When i was a child, summers would be =>was used to be warmer and winters colder than now.

4.None of the young=> youth in the village can find job.

5.It took them at least two months learning=> to learn how to pronounce these words.

6.What do=> did you use to do when you felt afraid?

7.I've been studying French since i've=> was high school.

8.Before you leave, please duplicate that tile by make => making a copy on the CD-ROM.

9.The last payment shouldn't make=> be maked until all the work has been completed and carefully checked.

10.You'll see a copy before they're=> it's printed by the printer.

11.We've been here only one day, but we've been => 0taken three rolls of films.

12.The house painted=> was painted more than three years ago, but i'm not going to have it done again for a while.

14 tháng 12 2018

cau 4 minh lam la:the youngest

dung hay sai vay

21. David: “ Thank you for the delicious meal” - Joan: “___________” A. Never wonder B. No problem C. All right D. I’m glad you enjoyed it 22. “How much do you earn, Joe?” - “I’d ___________”. A. better not to say B. rather not say C. prefer not say D. rather don’t say 23. It is very important for a firm or a company to ___________ changes in the...
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21. David: “ Thank you for the delicious meal” - Joan: “___________”

A. Never wonder B. No problem C. All right D. I’m glad you enjoyed it

22. “How much do you earn, Joe?” - “I’d ___________”.

A. better not to say B. rather not say C. prefer not say D. rather don’t say

23. It is very important for a firm or a company to ___________ changes in the market.

A. keep in touch with B. keep pace with C. keep pace of D. keep track with

24. I can’t help you with your homework tonight; ___________ shopping.

A. I go B. I’m going C. I have gone D. I’ll go

25. She spends a ___________ deal of her time gardening.

A. large B. high C. big D. great

26. Your behaviour makes me ___________ .

A. anger B. in anger C. angrily D. angry

27. Some people ___________sport to keep fit, not because they like it.

A. train B. do C. practice D. make

28. ___________ that it might be easier to prepare a better map of the moon than of the Earth.

A. The saying B. It is said C. They say D. To say

29. The facilities of the old health centre ___________ .

A. are as good as or better than the new centre. B. are as good or better than the new centre.

C. is as good or better than the new centre. D. are as good as or better than those of the new centre.

30. We are all dependent ___________ our cars and should be encouraged to leave them at home.

A. of B. on C. to D. in

31. ___________ weather! We can’t go out for a walk now.

A. How a terrible B. How terrible C. What terrible D. What a terrible

32. We should study hard ___________ our parents can be proud of us.

A. as that B. in order to C. in order that D. so as to

33. These chairs are ___________ better than the others.

A. as B. much C. very D. either

34. Why did Berth ask you ___________ a bicycle?

A. that you had B. do you have C. that if you had D. if you had

35. Malaria is a disease ___________ by the anopheles.

A. transmit B. transmitting C. is transmitted D. transmitted

36. "What’s it ___________?" - "A flute."

A. said B. spoken C. called D. told

37. "I can’t see the stage very well from here." - "___________."

A. Neither I can B. I can’t neither C. Neither can I D. Neither can’t I

38. I applied for the job that I saw ___________ in the paper.

A. be advertised B. advertised C. being advertising D. advertising

39. He looked like such a fool with his hair dyed green that I just _________ laughing at it.

A. didn’t stop B. couldn’t enjoy C. couldn’t help D. can’t help

40. I __________ more money on teachers if I __________ the Minister of Education and Training.

A. would spend / did B. will spend / were C. would spend / were D. spent / was

1
14 tháng 8 2020

21. David: “ Thank you for the delicious meal” - Joan: “___________”

A. Never wonder B. No problem C. All right D. I’m glad you enjoyed it

22. “How much do you earn, Joe?” - “I’d ___________”.

A. better not to say B. rather not say C. prefer not say D. rather don’t say

23. It is very important for a firm or a company to ___________ changes in the market.

A. keep in touch with B. keep pace with C. keep pace of D. keep track with

24. I can’t help you with your homework tonight; ___________ shopping.

A. I go B. I’m going C. I have gone D. I’ll go

25. She spends a ___________ deal of her time gardening.

A. large B. high C. big D. great

26. Your behaviour makes me ___________ .

A. anger B. in anger C. angrily D. angry

27. Some people ___________sport to keep fit, not because they like it.

A. train B. do C. practice D. make

28. ___________ that it might be easier to prepare a better map of the moon than of the Earth.

A. The saying B. It is said C. They say D. To say

29. The facilities of the old health centre ___________ .

A. are as good as or better than the new centre. B. are as good or better than the new centre.

C. is as good or better than the new centre. D. are as good as or better than those of the new centre.

30. We are all dependent ___________ our cars and should be encouraged to leave them at home.

A. of B. on C. to D. in

31. ___________ weather! We can’t go out for a walk now.

A. How a terrible B. How terrible C. What terrible D. What a terrible

32. We should study hard ___________ our parents can be proud of us.

A. as that B. in order to C. in order that D. so as to

33. These chairs are ___________ better than the others.

A. as B. much C. very D. either

34. Why did Berth ask you ___________ a bicycle?

A. that you had B. do you have C. that if you had D. if you had

35. Malaria is a disease ___________ by the anopheles.

A. transmit B. transmitting C. is transmitted D. transmitted

36. "What’s it ___________?" - "A flute."

A. said B. spoken C. called D. told

37. "I can’t see the stage very well from here." - "___________."

A. Neither I can B. I can’t neither C. Neither can I D. Neither can’t I

38. I applied for the job that I saw ___________ in the paper.

A. be advertised B. advertised C. being advertising D. advertising

39. He looked like such a fool with his hair dyed green that I just _________ laughing at it.

A. didn’t stop B. couldn’t enjoy C. couldn’t help D. can’t help

40. I __________ more money on teachers if I __________ the Minister of Education and Training.

A. would spend / did B. will spend / were C. would spend / were D. spent / was

B. Identify the one underlined word or phrase - A, B, C or D - that must be changed for the     sentence to be correct.1. We are going to study tonight until we will finish this chapter.                 A              B                   C                D2. Only in the last few years people have begun to use home computers.       A           ...
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B. Identify the one underlined word or phrase - A, B, C or D - that must be changed for the
     senten
ce to be correct.

1. We are going to study tonight until we will finish this chapter.

                 A              B                   C                D

2. Only in the last few years people have begun to use home computers.

       A            B                                          C            D

3. Have you heard the news? The President has been shooting!

       A                           B                                       C         D

4. The girl whom you met last night was used to be a singer.

      A             B                                        C         D

5. They are going to have to leave soon, and so do we.

                    A                         B                     C     D

6. Not until the early 1960s did the birthrate in the United States began to decline.

          A                                            B                                                C           D

7. I'll fly to Mars next week. I've already gotten a ticket.

       A            B                              C                    D

8. Look! That plane is flying towards the airport. It's landing.

                 A                  B           C                                 D

9. Many insects make sound because they have no vocal apparatus in their throats.

                             A                    B            C                                                 D

10. The rock formations in the Valley of Fire in Nevada has been worn into many strange shapes by the
                                                                                            A             B                          C                     D

1
5 tháng 12 2021

1. We are going to study tonight until we will finish this chapter.

                 A              B                   C                D

2. Only in the last few years people have begun to use home computers.

       A            B                                          C            D

3. Have you heard the news? The President has been shooting!

       A                           B                                       C         D

4. The girl whom you met last night was used to be a singer.

      A             B                                        C         D

5. They are going to have to leave soon, and so do we.

                    A                         B                     C     D

6. Not until the early 1960s did the birthrate in the United States began to decline.

          A                                            B                                                C           D

7. I'll fly to Mars next week. I've already gotten a ticket.

       A            B                              C                    D

8. Look! That plane is flying towards the airport. It's landing.

                 A                  B           C                                 D

9. Many insects make sound because they have no vocal apparatus in their throats.

                             A                    B            C                                                 D

10. The rock formations in the Valley of Fire in Nevada has been worn into many strange shapes by the
                                                                                            A             B                          C                     D

I. Chọn đáp án đúng: A,B,C hoặc D để hoàn thành câu (5 đ) 1. If I were you.......................phone and tell her you’re going to late. A. I’d B. I’ll C. I’d have D. I. 2. If man were less greedy, more animal species could avoid.................. A. danger B. death C. threat ...
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I. Chọn đáp án đúng: A,B,C hoặc D để hoàn thành câu (5 đ)

1. If I were you.......................phone and tell her you’re going to late.

A. I’d B. I’ll C. I’d have D. I.

2. If man were less greedy, more animal species could avoid..................

A. danger B. death C. threat D. extinction.

3. We all like that teacher.......................his nice sense of humour.

A. because of B. because C. on account D. for.

4. You really.....................stop smoking, you know. It’s bad for you.

A. must B. should C. ought D. would be.

5. ..........................we live on the same street, we hardly ever see each other.

A. Despite B. Although C. Because of D. Because.

6. Jack.........................me that he was enjoying his new class.

A. said B. told C. talked D. asked.

7. What about...............................with me tonight?

A. going to ride B. to going to ride C. go riding D. going for a ride.

8. If you..................me with this exercise, I will do the same for you one day.

A. helped B. would help C. help D. will help.

9. After Tom had finished doing his homework, he.................to bed.

A. went B. had gone C. have gone D. was going.

10. According to the weather........................there will be rain tomorrow.

A. information B. programme C. forecast D. news.

11. I’d have told you if I.......................the book.

A. had seen B. would have seen C. saw D. see.

12. It was raining very.....................so I took my umbrella.

A. wet B. badly C. hard D. firmly.

13. My sister in an expert on wildlife and its..................

A. conserve B. preserve C. conservation D. reservation.

14. Tell me the..................for your absence yesterday.

A. cause B. aim C. reason D. result.

15. By cutting down trees we...........the natural habitat of birds and animals.

A. damage B. harm C. hurt D. injure.

16. The children were.....................into small groups to discuss the problems of the disabled.

A. divided B. apart C. separated D. classified.

17. If I........................the chance, I would have trained to be a doctor.

A. would have had B. would have C. have had D. had had.

18. Did you see that fascinating wildlife programme..................television last night?.

A. on B. at C. in D. by.

19. This book will provide you........................all the information you need.

A. for B. of C. with D. x (nothing).

20. Who’s going to......................after the children while you’re away?

A. take B. look C. care D. take care.

III. Cấu tạo các từ trong ngoặc ở dạng đúng (2,5 đ)

1. They enjoy the ____________ atmosphere here (peace).
2. The _________ of old buildings should be taken into consideration. (preserve)
3. The problem of ________ among young people is hard to solve. (employ)

4. Read the book ________ and you can find the information you need. (careful)

5. They are going to _______ the pool to 1.8 meter. (deep)

1
5 tháng 4 2020

I. Chọn đáp án đúng: A,B,C hoặc D để hoàn thành câu (5 đ)

1. If I were you.......................phone and tell her you’re going to late.

A. I’d B. I’ll C. I’d have D. I.

2. If man were less greedy, more animal species could avoid..................

A. danger B. death C. threat D. extinction.

3. We all like that teacher.......................his nice sense of humour.

A. because of B. because C. on account D. for.

4. You really.....................stop smoking, you know. It’s bad for you.

A. must B. should C. ought D. would be.

5. ..........................we live on the same street, we hardly ever see each other.

A. Despite B. Although C. Because of D. Because.

6. Jack.........................me that he was enjoying his new class.

A. said B. told C. talked D. asked.

7. What about...............................with me tonight?

A. going to ride B. to going to ride C. go riding D. going for a ride.

8. If you..................me with this exercise, I will do the same for you one day.

A. helped B. would help C. help D. will help.

9. After Tom had finished doing his homework, he.................to bed.

A. went B. had gone C. have gone D. was going.

10. According to the weather........................there will be rain tomorrow.

A. information B. programme C. forecast D. news.

11. I’d have told you if I.......................the book.

A. had seen B. would have seen C. saw D. see.

12. It was raining very.....................so I took my umbrella.

A. wet B. badly C. hard D. firmly.

13. My sister in an expert on wildlife and its..................

A. conserve B. preserve C. conservation D. reservation.

14. Tell me the..................for your absence yesterday.

A. cause B. aim C. reason D. result.

15. By cutting down trees we...........the natural habitat of birds and animals.

A. damage B. harm C. hurt D. injure.

16. The children were.....................into small groups to discuss the problems of the disabled.

A. divided B. apart C. separated D. classified.

17. If I........................the chance, I would have trained to be a doctor.

A. would have had B. would have C. have had D. had had.

18. Did you see that fascinating wildlife programme..................television last night?.

A. on B. at C. in D. by.

19. This book will provide you........................all the information you need.

A. for B. of C. with D. x (nothing).

20. Who’s going to......................after the children while you’re away?

A. take B. look C. care D. take care.

III. Cấu tạo các từ trong ngoặc ở dạng đúng (2,5 đ)

1. They enjoy the ___peaceful_________ atmosphere here (peace).
2. The ___preservation______ of old buildings should be taken into consideration. (preserve)
3. The problem of __unemployment______ among young people is hard to solve. (employ)

4. Read the book __carefully______ and you can find the information you need. (careful)

5. They are going to __deepen_____ the pool to 1.8 meter. (deep)

B. Identify the one underlined word or phrase - A, B, C or D - that must be changed for the​​ sentence to be correct. 36. Jack will win​​ the​​ election​​ if​​ lie​​ campaigned​​ harder. A B C D 37. We're used to​​ think​​ that there​​ was​​ no life in the ocean​​ depths.​​ A ​​ B C ...
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B. Identify the one underlined word or phrase - A, B, C or D - that must be changed for the​​ sentence
to be correct.
36. Jack will win​​ the​​ election​​ if​​ lie​​ campaigned​​ harder.
A B C D
37. We're used to​​ think​​ that there​​ was​​ no life in the ocean​​ depths.​​
A ​​ B C D
38. A​​ large portion of the​​ world's​​ water supply​​ have been​​ contaminated by
factory​​ waste,​​ ships and oil​​ spills.
A B C D
39. Were Mr Morgan​​ still head teacher, he​​ would​​ not permit​​ such​​ bad​​ behave.​​
A B C D
40. You​​ can't​​ go​​ into​​ the reception​​ if​​ you've got​​ a ticket.
A B C D
41. The match​​ was​​ cancelled​​ due to​​ the​​ weather​​ was bad.
A B C D
42.​​ Despite​​ his​​ disability, he tried​​ leading​​ as normal​​ a life​​ as possible.​​
A B C D
43. Could​​ you tell me when​​ does​​ the next train​​ leaves​​ and where​​ to buy​​ tickets?​​
A B C D
44. I​​ think​​ you​​ shouldn't​​ do if it's​​ the right​​ thing​​ to do.
A B C D
45. Unless​​ we​​ work harder, we​​ will​​ finish​​ on​​ time.
A B​​ C​​ D

1
12 tháng 2 2020

chỗ nào có can' là dấu ' nha nó bị lỗi

A.​​ Choose the word or phrase - a, b, c, or d - that best completes the sentence. 21. ​​ What would Tom do if he ......................... the truth? a. would know b. has know c. knows d. knew 22. Jim wanted to know................call and tell him where to meet you. a. you could b. whether you can c. if you could d. when could you 23. Could you​​ talk........................? I'm trying to work. a. more quietly b. quieter than c. more quiet d. quiet 24. Whales and sharks are...
Đọc tiếp

A.​​ Choose the word or phrase - a, b, c, or d - that best completes the sentence.
21. ​​ What would Tom do if he ......................... the truth?
a. would know b. has know c. knows d. knew
22. Jim wanted to know................call and tell him where to meet you.
a. you could b. whether you can c. if you could d. when could you
23. Could you​​ talk........................? I'm trying to work.
a. more quietly b. quieter than c. more quiet d. quiet
24. Whales and sharks are carnivores ....................... means they eat meat.
a. this b. that c. it d. which
25. Would you mind................. me tomorrow?​​
a. call b. calling c. to call d. if you call
26. You....................Mark. You know it's a secret.
a. should tell b. shouldn't tell c. couldn't tell​​ ​​ d. might tell
27. Owls have a strong beak and sharp talons.................mice and other small prey:

a. which used to catch b. used for catching
c. their use is to catch d. they are used for catching
28. We wondered why....................... a tip.
a. to leave b. should we leave​​ c. we should leave d. don't we leave
29. If someone .................... into the store, smile and say, 'May I help you?'
a. comes b. came c. will come d. would come
30. ...............you, I would think twice about that decision. It could be a bad move.
a. f I am b. Should I be c. Were I d. If I had been
31. 'Would you like some cake?';​​ 'No, thanks. If I​​ ​​ cake, I....................fat.'
a. ate/ will get b. ate/ would get
c. mould eat/ could get d. am eating/ will get
32.' What are you doing later this afternoon?' ' Oh, ................. the game finishes, go home, I expect.'
a. if b. in c asec. unless d. when
33. She's been studying​​ hard for the exam, so she.................to pass.
a. should b. ought​​ c. had better d. must
34. If I weren't working for an accounting firm, I​​ ​​ in a bank.
a. work b. will work c. have worked​​ d. would be working
35. 'Why are you so late?' 'I .................... my aunt to the airport. The traffic was terrible
a. could take b. must have taken ​​ c. should take d. had to take

0
Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions. 12. A: I think people nowadays prefer instant messaging and social networking to emails. B: ____ A. I don't like emails. B. That's true! C. I'd prefer text messaging. D. That's OK! 13. A: Do you like e-books? B: ____ A. No, I prefer them printed. B. They're expensive. C. No,...
Đọc tiếp

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

12. A: I think people nowadays prefer instant messaging and social networking to emails.

B: ____

A. I don't like emails. B. That's true! C. I'd prefer text messaging. D. That's OK!

13. A: Do you like e-books?

B: ____

A. No, I prefer them printed. B. They're expensive.

C. No, e-books are good. D. I like them both.

14. Smartphone can be a great learning ____ but you need to think of how to use it effectively.

A. benefit B. choice C. invention D. tool

15. It is convenient for you to read ____ when you travel.

A. e-books B. laptops C. online game D. smartphones

16. Many young people carry a pair of earbuds as they are small, light, and ____.

A. chargeable B. economical C. portable D. transferable

17. Washing machine or vacuum cleaner can help you to ____ time while doing housework.

A. kill B. save C. spend D. waste

18. Velcro has gradually become a familiar ____ for shoes, jackets, and even spacesuits.

A. button B. fastener C. locker D. zipper

19. Most smartphones now ____ flash player as well as voice and video calls.

A. display B. offer C. provide D. support

20. _____ is used to talk to people when you are away from home.

A. cell phone B. fax machine C. radio D. camcorder

21. Hurry up! The bus ______ in a moment.

A. will arrive B. is arriving C. arriving D. will be arriving

22. The cat is just behind the mouse. It ______ the latter.

A. is catching B. will catch C. catches D. is going to catch

23. The internet helps us to interact ______ other people around the world.

A. to B. from C. of D. with

24. I hope He _____ catch up with us soon.

A. is going B. will C. doesn’t D. is

25. Please close the window. The rain.

A. come B. is coming C. had come D. came

26. We managed to climb over the wall without ______.

A. being seen B. to see C. to be seen D. seeing

27. Many animals are ______ for their fur or other valuable parts of their bodies

A. dying B. killing C. killed D. died

28. We'll be late unless we _____ now.

A. leave B. don't leave C. had left D. have left

29. This computer isn't capable _____ running this software.

A. on B. of C. in D. for

30. Sea water is salty. If the oceans ______ of fresh water, there ______ plenty of water to irrigate all of the deserts in the world.

A. consisted/ would be B. consisted/ were

C. would consist/ could be D. consist/ will be

31. ______ you turn on the radio, I’d like to hear the latest news?

A. Should B. Will C. May D. Must

1
25 tháng 2 2020

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

12. A: I think people nowadays prefer instant messaging and social networking to emails.

B: ____

A. I don't like emails. B. That's true! C. I'd prefer text messaging. D. That's OK!

13. A: Do you like e-books?

B: ____

A. No, I prefer them printed. B. They're expensive.

C. No, e-books are good. D. I like them both.

14. Smartphone can be a great learning ____ but you need to think of how to use it effectively.

A. benefit B. choice C. invention D. tool

15. It is convenient for you to read ____ when you travel.

A. e-books B. laptops C. online game D. smartphones

16. Many young people carry a pair of earbuds as they are small, light, and ____.

A. chargeable B. economical C. portable D. transferable

17. Washing machine or vacuum cleaner can help you to ____ time while doing housework.

A. kill B. save C. spend D. waste

18. Velcro has gradually become a familiar ____ for shoes, jackets, and even spacesuits.

A. button B. fastener C. locker D. zipper

19. Most smartphones now ____ flash player as well as voice and video calls.

A. display B. offer C. provide D. support

20. _____ is used to talk to people when you are away from home.

A. cell phone B. fax machine C. radio D. camcorder

21. Hurry up! The bus ______ in a moment.

A. will arrive B. is arriving C. arriving D. will be arriving

22. The cat is just behind the mouse. It ______ the latter.

A. is catching B. will catch C. catches D. is going to catch

23. The internet helps us to interact ______ other people around the world.

A. to B. from C. of D. with

24. I hope He _____ catch up with us soon.

A. is going B. will C. doesn’t D. is

25. Please close the window. The rain.

A. come B. is coming C. had come D. came

26. We managed to climb over the wall without ______.

A. being seen B. to see C. to be seen D. seeing

27. Many animals are ______ for their fur or other valuable parts of their bodies

A. dying B. killing C. killed D. died

28. We'll be late unless we _____ now.

A. leave B. don't leave C. had left D. have left

29. This computer isn't capable _____ running this software.

A. on B. of C. in D. for

30. Sea water is salty. If the oceans ______ of fresh water, there ______ plenty of water to irrigate all of the deserts in the world.

A. consisted/ would be B. consisted/ were

C. would consist/ could be D. consist/ will be

31. ______ you turn on the radio, I’d like to hear the latest news?

A. Should B. Will C. May D. Must

25 tháng 2 2020

yeu

25 tháng 10 2021

27. Do - did (quá khứ với nghĩa đã từng)

28. Needs - need (chủ ngữ the disabled - mang nghĩa nói chung cho những người tàn tật, nên đóng vai trò như N số nhiều)

29. Blind and deaf (tính từ)

30. Who - which (which mang nghĩa cho cả cụm đằng trước, câu mệnh đề quan hệ ko xác định)