IX.
1. They should be in bed
2. They shouldn't smoke in here
3. You should clean them more pften
4. We shouldn't talk too loudly
6. We should take our unbrellas
7. She shouldn't go to sleep so late
8. You should be punctual
X.
1. Shall
2. Must
3. Would
4. Can
5. Must
6. Shouldn't
7. Should
8. Mustn't
9. Should
10. Must
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Chúc bạn học tốt!