Question

Giúp em bài này ạ

    

Answer 1

Ex1

1 has to

2 must

3 have to

4 must

5 has to

6 have to

7 must

8 must

9 must

10 have to

Answer 2

Ex2

1 B

2 A

3 C

4 A

5 D

6 C

7 D

8 B

9 C

10 B

Answer 3

11 C

12 D

13 B

14 B

15 D

16 B

17 D

18 D

19 C

20 D