Rewrite the following sentences using active voice:
1. By whom are you taught Physics?
2. What was bought by her?
3. By whom will the bill be paid?
4. A letter was being written by him.
5. My work was not being done by me.
6. Was hockey being played by the children?
7. The food had already been cooked by her.
8. By whose team had the match been won?
9. You are requested to post this letter.
10. You are advised to work hard.
11. Was the window broken by him?
12. What is wanted by you?
13. The match might be won by her.
14. My proposal was objected to by her.
15. His request was acceded to by us.
16. It is said that he is a rich man.
17. I am surprised at your behavior.
18. Milk is contained in this bottle.
19. Is French spoken by them?
20. From where was this pen bought by you?