II.
25. am studying
26. did you buy/ bought
27. Have you ever been/ haven't been
28. volunteers
29. to help
30. donating
III.
1. Do you have any hooby?
2. What does your brother do in his free time?
3. He usually goes climbing mountain in the summer.
4. I enjoy playing monopoly with my friends.
5. Jim finds making models boring because it takes lots of time.
6. Will you take up ice-skating in the future?
7. What can we do to help the environment clean?
8. Have you ever done any volunteer work?