Упр.2

1)must

2)must

3) mustn't

4) mustn't

5) mustn't

6) don't have

7)must

8)must

9)must

10) mustn't

11) mustn't

Упр.3

1. mustn't

2.mustn't

3.needn't

4.mustn't

5.needn't

6.mustn't

7.needn't

8.needn't

9.needn't

10.mustn't

11.mustn't

Упр.4

1.must

2.must

3.need

4.need

5.need

6.can

7.must

8.can

9.must

10.can

Объяснение: