1. b) am
2. d) He's got
3. b) doesn't
4. a) you
5. b) Does
6. b) There are
7. c) any
8. b) Can
9. d) am studying
10. b) living
11. c) went
12. a) did you go
13. c) is going
14. c) better
15. b) has already seen
16. d) since
17. b) have been working
18. a) used to
19. c) had to
20. b) neither do I
21. d) was watching
22. b) was stolen
23. c) am sent