B

19C

20B

in spite of Nam trying his best,he  failed the exam the high school

1 A

2 D

3 C

4 B

5  C

6 B

7 A

8 A

9 B

10 D

11 A

12 C

13 A

14 B 

D - B - D - A - B - C - C - A - B - A - C - C 
B - A - D

C - A - B - D - A - B - D - C - B - B

B - B - B -  D - A - D - D - C - B - C - A

C - B - A - A - D