Verified answer

Объяснение:

1) mustn't;

2) must;

3) doesn't have to;

4) don't have to;

5) mustn't;

6) must;

7) don't have to;

8) doesn't have to;

9) mustn't;

10) have to;

11) must;

12) doesn't have to;

13) mustn't;

14) have to;

15) mustn't.