The answers to the questions above are as follows:

1. b (Can)

2. c (must)

3. c (should)

4. a (might)

5. b (Could)

6. d (mustn't)

7. d (must)

8. d (would)

9. a (can't)

10. a (would)

11. c (mustn't)

12. b (should)