Ответ:

1. what

2. how

3. how often

4. why

5. whose

6. who

7. when

8. how many

9. how

10. when

11. what

12. who

13. why

14. what

15. what

16. how

17. where

18. how

19. who

20. when

21. why

22. whose

должно быть так;)