II. Complete the sentences with must or mustn’t, should or shouldn’t
1. I _______________ take some exercise if I want to feel fine.
2. I __________________ worry about the exam if I were you. You have worked really hard.
3. You look tired. I think you __________________ take a few days off.
4. You __________________swim in that river. It's full of crocodiles
5. You _____________________ drink so much. It's not good for your health.
6. Jenny, you ___________________ play in the street!
7. You __________________ come to school on time.