Question

1) The girl is rather young; she mustn't / can't be awake so late. 2) I think you mustn't / can't work harder. 3) Mustn't/ Can't you sit still? 4) The car is his father's, we mustn't / can't take it. 5) Our teacher mustn't / can't be late for the classes either. 6) The water is rather hot, but I think you must / can drink it. 7) The soldiers must / can obey their officers. 8) You must / can pay for your lunch yourself if you want. 9) Must / Can I use your bathroom? 10) I must / can work harder, sol may be helpful. 2 Fill in can/can't or must/mustn't.

Answer 1

1. Can’t
2. Mustn’t
3. Can’t
4. Mustn’t
5. Mustn’t
6. Can
7. Must
8. Can
9. Can
10. Must

Answer 2

1. The girl is rather young; she mustn't be awake so late.
2. I think you can't work harder.
3. Can't you sit still?
4. The car is his father's, we mustn't take it.
5. Our teacher mustn't be late for the classes either.
6. The water is rather hot, but I think you can drink it.
7. The soldiers must obey their officers.
8. You must pay for your lunch yourself if you want.
9. Can I use your bathroom?
10. I must work harder, so it may be helpful.