Answer:
1. You mean what?
2. He does what?
3. Tennis is played how?
4. You do what?
5. She eats when?
6. This picture was drawn by who?
7. The letter is being written by whom?
8. Ram eats what?
9. They follow us why?
10. It is done by who?
11. You are being called by who?
12. You are being demanded to drive by who?
13. You want whom?
14. You know about how many people?
15. You are writing which book?
Explanation:
In Active Voice, the subject acts and the object receives the action.
(e.g. The snake bit the duck)
In Passive Voice,the object acts and the subject receives the action.
(e.g. The duck was bitten by the snake)
In the example sentences, the snake is the subject and the duck is the object.
(Feel sorry for the duck though:(