II.Turn into the passive voice

1. The zoo keepers  feeds the animals twice a day.

2. Some drunk drivers caused the accident in the city

3. People have developed many different paper products.

4. My mother gave me a new pair of  jeans on my fifteenth birthday.

5. Our factory doesn’t produce this kind of paper.

6 . People don’t use this road very often .

7.  Nobody told me the story.

8.Mr Black has already bought some shirts .

9. They have ever visited Opera House.

10. She hasn’t done her homework yet.