Change these sentences into passive form: They told the new pupil where to sit

Change these sentences into passive form :
1. They told the new pupil where to sit
2. I know that they had told him of the meeting
3. Nobody has ever treated me with such kindness
4. No one believes his story
5. A sudden increase in water pressure may break the dam
6. We must take good care of books borrowed from the library.
7. A man I know told me about it
8. We can never find him at home for he is always on the movie
9. They use milk for making butter and cheese
10. Science and teachnology have completely changed human life
11. Jonh used to visit Mr. Cole at weekends
12. Weeds cover the riverbank
13. Smoke filled the room