I
1C
2A
II
3C
4D
It is very necessary to study English
1B
2D
3B
4D
5B
C
B
1D
2A
3C
4B
5A
6C
7A
8A
9B
10D
11D
12B
13B
14D
15D
16C
17A
18A
19D
20D