Use "must", "should", "can", "might", "may", "could", "mustn't", "shouldn't", "can't", "might not", "may not", "couldn't" for each sentence.
1. You ___ obey the rules.
2. You ___ take this medicine.
3. I think I ___ take your advice.
4. The weather ___ rain. It might be sunny.
5. You ___ go to work late.
6. ___ you lend me your pen?
7. My sister ___ swim when she was five years old.
8. You ___ listen it. It is very important.
9. You ___ watch TV now. It's dinner time.
10. We ___ reduce the trash, keep the green for invironment.
1 must
2 should
3 shouldn't
4 mightn't
5 shouldn't
6 Could
7 could
8 must
9 shouldn't
10 should