Ответ:

1. must

2. must

3. mustn't

4. mustn't

5. must

6. must

7. mustn't

8. must

9. mustn't

10. mustn't

11. mustn't

12. mustn't

13. must

14. mustn't

15. mustn't

16. must

Ответ:

1. you must raise your hand to speak

2. you must study hard if you want...

3. you mustn't sleep in class

4. you mustn't arrive late to school

5. must

6. must

7. mustn't

8. must

9. mustn't

10. mustn't

11. mustn't

12. mustn't

13. must

14. mustn't

15. mustn't

16. must