Question

giúp mình vs

Answer 1

Ex IV.

1, must

2. mustn't

3, haven't to

4. have to

5, Must you

6, must

7, has to

8, have to

9, Must you

10, haven't to

11, have to

12, have to

13, must

14, have to

15, mustn't

Ex V.

1.c

2.d

3, a

4. e

5, f

6. b

7. g