Ответ:

1. Rewrite the sentenses in the Passive. Use an agent only if necessary.

1. My bicycle had been stolen (by someone)
2. The office will be cleaned later
3. A new computer systems are being used by the police to investigate crimes.
4. Twenty books at the city library were destroyed by the people last month.
5. A lot of questions were being asked by the journalists
6. Ten silver rings have been sold today
7. A wallet full of money was found by somebody yesterday
8. Miss Jenkins, the head teacher will be remembered by the students at our school.