1) A group of students have met their friends at the railway station.

→ Their friends have been met at the railway station by a group of students.

2) They didn't allow Tom to take these books home.

→ Tom wasn't allowed to take these books home.

3) The teacher won't correct exercises tomorrow.

→ Exercises won't be corrected by the teacher tomorrow.

4) How many trees did they cut down to build that fence?

→ How many trees were cut down to build that fence?

5) This well-known library attracts many people.

→ Many people are attracted by this well-known library.

6) All students attended the meeting.

→ The meeting was attended by all students.

7) People say that he is intelligent.

→ He is said to be intelligent.

8) He can't repair my bike.

→ My bike can't be repaired by him.

9) Mary has operated Tom since 10 o'clock.

→ Tom has been operated by Mary since 10 o'clock.

10) This is the second time they have written to us about this.

→ This is the second we have been written to about this.

11) Mr. Smith has taught us French for 2 years.

→ We have been taught French by Mr. Smith for 2 years.

12) They didn't look after the children properly.

→ The children weren't looked after properly.

13) Nobody swept this street last week.

→ This street wasn't swept last week.

14) People drink a great deal of tea in England.

→ A great deal of tea is drunk in England.

15) People speak English all over the world.

→ English is spoken all over the world.

16) Tom was writing 2 poems.

→ 2 poems were being written by Tom.

17) She often takes her dog for a walk.

→ Her dog is often taken  fora walk by her.

18) How many lessons are you going to learn next month?

→ How many lessons learn is going to be next month?

19) She didn't introduce me to her mother.

→ I wasn't introduced to her mother by her.

20) Someone had invented electric lights before I was born.

→ Electric lights had been invented before I was born.

21) Farmers usually milk cows twice a day.

→ Cows are usually milked by farmers twice a day.

22) He likes people to call him "sir".

→ He is liked people to call him "sir".

23) People know that Japan produces a wide range of cars.

→ Japan is known to be produced a wide range of cars.

24) Our teacher used to bid us talk in class.

→ We were used to be bidded in class by our teacher.

25) Don't let other see you.

→ You aren't seen by let other.

26) Workers were digging a large hole in the ground.

→ A large hole was being digged in the ground by the workers.

27) Before they took exams they had revised their lesson.

→ Before exams were taken their lesson has been revised.

28) The car knocked a woman down in the street.

→ A woman was knocked down in the street by the car.

29) When he came home his father was reading a newspaper.

→ When he came home, a newspaper was being read by his father.

CHO MK CÂU TRẢ LỜI HAY NHẤT NHÉ
1. A group of students have met their friends at the railway station.
=>Their friends have been met at the railway station(by a group of students)
2. They didn’t allow Tom to take these books home.
=>Tom wasn't allowed to take these books home
3. The teacher won’t correct exercises tomorrow.
=>Exercises won't be corrected by the teacher tomorrow
4. How many trees did they cut down to build that fence?
=>How many trees were cut down to build that fence? 
5. This well-known library attracts many people.
=>Many people are attracted by this well- known library. 
6. All students attended the meeting.
=> The meeting was attended by all students. 
7. People say that he is intelligent.
=>He is said to be intelligent.
8. He can’t repair my bike.
=> My bike can't be repaired by him. 
9. The doctors have operated Tom since 10 o’clock.
=>Tom has been operated by the doctors since 10 o'clock.
10. This is the second time they have written to us about this.
=>This is the second time we have been written to about this.

11. Mr. Smith has taught us French for two years.
=> We have been taught french by mr.smith for two years 
12. They didn’t look after the children properly.
=> The children weren't looked after properly 
13. Nobody swept this street last week .

=> This street wasn't swept last year 
14. People drink a great deal of tea in England.
=>A great deal of tea is drank in england
15. People speak English all over the world.
=> English is spoken all over the world 
16. Tom was writing two poems.
=> Two poems were being written by tom 
17. She often takes her dog for a walk.
=> Her dog is often taken for a walk 
18. How many lessons are you going to learn next month?
=> How many lesson learn is going to be next month 
19. She didn’t introduce me to her mother
=>I wasn't introduced to her mother 
20. Someone had invented the electric light before I was born.
=> The eletric light has been invented before I was born.
21. Farmers usually milk cows twice a day.
=> Milk cow are usually by farmers twice a day 
22. He likes people to call him “sir”.
=> He is liked people call him “sir”.
23. People know that Japan produces a wide range of cars.
=> Japan is knew to be produced a wide range of cars.
24. Our teacher used to bid us talk in class.
=> We was used to be bidded in class by our teacher 
25. Don’t let others see you.
=>You aren't saw by let others
26.  Workers were digging a large hole in the ground.
=>A large hole was digged in the ground by workers.
27. Before they took exams they had revised their lessons.
=> Before exams were taken their lesson has been revised.
28. The car knocked a woman down in the street.
=> A woman was knocked down in the street by the car.
29. When he came home, his father was reading a newspaper.
=>When he came home, a newspaper was read by his father.