1. My student's friend has been met at the station by them

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

3. The exercises won't be corrected by the teacher tomorrow

4. How many trees which were cut down?

5. Many peole are attracted by this well-known library

6. The meeting was attended by all students

7. He is said to be intelligent

8. My bike can't be repaired by him

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

10. French has been taught to us by Mr. Smith for 2 years

11. The children weren't looked after properly

12. This streer wasn't swept last week

13. A great deal of tea is drunk in England

14. English is spoken all over the world

15. 2 poems were being written by Tom

1. My students have met their friend at the station.
-> My students' friend has been met at the station.

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?
-> How many trees was cut down?

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.
-> It is said that he is intelligent.

8. He can't repair my bike.
-> My bike can't repaired by him.

9. Mary has operated Tom since 10 o'clock.
-> Tom has been operated by Mary since 10 o'clock.

10. Mr. Smith has taught us French for 2 years.
-> We have been taught French by Mr. Smith for 2 years.

11. They didn't look after the children properly.
-> The children weren't looked after properly.

12. Nobody swept this street last week.
-> This street wasn't swept last week.

13. People drink a great deal of tea in England.
-> A great deal of tea is drunk in England.

14. People speak English all over the world.
-> English is spoken all over the world.

15. Tom was writing 2 poems.
-> 2 poems were being written by Tom.