Question

  cứu tui

Answer 1

Ex1

1 C

2 A

3 D

4 D

5 B

6 C

7 A

8 C

9 B

10 D

11 C 

1 A

13 D

14 B

15 D

Ex2

1 A

2 C

3 D

4 D

5 D