16. When I came, an experiment .................. in the lab.

A. was being holding   B. has been held          C. was being held        D. has held

17. George is .................. Lisa.

A. marry with              B. marry to                  C. married with                        D. married to

18. Last night a tornado swept through Rockvill. It ............. everything in its path.

A. destroyed                B. was destroyed         C. was being destroyed            D. had been destroyed

19. Dynamite ................... by Alfred Bernard Nobel.

A. have been invented             B. invented                  C. was invented                       D. was being invented

20. .................. this work .................. before you went to Moscow?

A. Will/ have been done B. Has/ been done                C. Will/ be done           D. Had/ been done

21. If you  .................. about it, will you be able to answer?

A. are asked                 B. ask                          C. will be asked                       D. asked

22. Do you believe that such a problem can ...................?

A. solve                       B. be solving                C. is solved                  D. be solved

23. “ Can’t we do something about the situation?”- “ Something ........ right now.”

A. is doing                   B. is do                                    C. is being done                       D. has been doing

24. The university .................. by private funds as well as by tuition income.

A. is supported                        B. supports                  C. is supporting                        D. has supported

25. This picture .................... by Johnny when I came.

A. painted                    B. was painted             C. was being painted    D. had been painted

26. It must .................. without delay.

A. do                           B. have been done       C. be doing                  D. be done

27. This exercise may .................. with a pencil.

A. be written                B. be to write               C. be writing                D. write

28. The money .................. to him 2 months ago, but it .................. back yet.

A. was lent/ had not been given                                   B. has been lent/ was not given

C. was lent/ has not given                                D. was lent/ has not been given

29. She could easily .................. for a top model.

A. be mistaken             B. have mistaken         C. been mistaken         D. to be mistaken

30. My shirt .................. by my sister on my last birthday.

A. gave                                    B. was given                C. had been given        D. was being given

I/ Change into passive voice
15 I have met my friend at the beach.
16 Her teacher gave me a pen last month.
17 She often sweep the floor every morning.
18 No one can do the exercise.
19 They knew that he stole the car.
20 It is difficult to answer the questions
21 She will be able to meet him.
22 He is going to visit the family
23 You must sweep the room everyday
24 We have to learn English every night.
25 They must improve plumbing at the village.
26 He is going to grow vegetables in the garden.
27 She used to drink coffee at night.
28 The people can raise cows at Duc Linh.
29 Have you ever met her?
30 Who can do the exercises?
31 What are you doing?

1. They built this church in 1973.

=> This church was built in 1973                     

  2. Do they teach English in your school?.

=> Is english taught in your school?

3. His story is not believed 

4. Someone is following her.

5. They asked me many difficult questions.        6. They are repairing my piano.

7. They are building a house.                               8. Students are doing a lot of homework.

9. Can the letter be written by Mary ?                 10. Do you understand this lesson?

11. our children were looked after by her when we were out.                        

12. Nobody has used this room for ages.              13. The boy hit the dog in the garden yesterday.

14.  this book was read by Mary                           15. Who has cleaned this room?

16. The fire has caused considerable damage.    

 18. No one may open this letter, may they ?

19. They bought her a present on her birthday.

20. Someone has told him to report for duty at 6.00pm        

21. The author has written a special edition for children.  

 22. They make these artificial flowers.

23. Does John return the book he borrowed yesterday ?

24. They are pulling down the old theatre.           

  25. we use this room onlyon special occasions.

26. Have they told you anything about it?              

27. What language do they speak in Japan?

28. Someone has taken her bag by mistake.          

 29. They haven’t done anything about it.

30. It is time some one told him what is wrong.

1 sắt cháy trong khí Oxi tạo Fe3O4 cho 8,4g sắt cháy trong bình chứa 1,12 lít Oxi

a tính khối lượng sản phẩm tạo thành

b sau phản ứng chất tạo thành dư bao nhiêu gam

Các yếu tố ảnh hưởng của trồng trọt ?

so sánh ưu nhược điểm của trồng trọt?