[参考答案]情态动词 基础练习
1. can't
2. couldn't
3. should
4. must
5. shall
6. can
7. must
8. must
9. needn't
10. shall
11. will
12. will
13. Shall
14. should
15. can
16. could
17. Shall
18. will
19. shouldn't
20. can
21. can
22. shouldn't
23. shall
24. can
25. can't