1. A. Charity
2. B. annoyed
3. A. when it started to rain
4. D. read
5. C. most important thing
6. D. Both B and C
7. C. participate in
8. D. handicapped
9. A. mission
10. C. donation
11. A. look after
12. A. exercise
13. B. album
14. A. useful
15. C. devoted
16. D. meaningless
17. B. I volunteered in an orphanage in the suburbs of our city
18. C. of
19. A. to give
20. B. but
21. D. shy