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9/
1. The lights were turned off when he went out.
2. The instrument was made long ago.
3. This letter will be translated into Vietnamese.
4. Children's stories are told to us by our grandmother.
5. My question hasn't been answered yet.
6. Have you been paid the money?

Ảnh 2/
1. A letter was being written to Mai by Peter.
2. Some phone calls weren't being made by my friends.
3. Was her mother being helped at that time?
4. Many accidents were being caused by bad drivers.
5. That report was being prepared by Alex when I came to see him.
6. Customers were being served by waiters and waitresses.
7. Those papers were being signed by presidents at 8 o'clock yesterday.
8. Was your calculator being repaired by your father when you came home?
9. Some fruit was being bought for Bill by Mr.Tom when I saw him.
10. The school gate was being painted by the painter.

6/
1. The thief had been arrested by the policeman.
2. The exact time of the match hadn't been decided before I came.
3. Had a lot of trees been cut?
4. Their frien had been met at the railway station by a group of students.
5. Tom hadn't been allowed to take these books home.
6. His story hadn't been believed before.
7. She had been invited to your party.
8. English had been taught there.
9. A book story had been read by Lan after dinner.