1. must
2.have to
3. have to, must
4. should
5.shouldn't
6. don't have to
7. must
8. mustn't
9. don't have to
10. shouldn't
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Answers & Comments
1. must
2.have to
3. have to, must
4. should
5.shouldn't
6. don't have to
7. must
8. mustn't
9. don't have to
10. shouldn't