1b
2d
3a
4a
5b
6a
7c
8d
9.b
10a
11c
12a
13d
14c

1b 2c 3a 4a 5b 6c 7c 8d 9b 10d 11a  

Ex1: 
1) B
2) D
3) A
4) A
5) B
6) B
7) C
8) D
9) C
10) D
11) A
12) C
13) D
14) C
Ex 3: 1) Mai is interested in writing short stories when she has the free time
2) Tom runs faster than Jim
3) Peter is the most intelligent in my class
4) Nam speaks English worse than Hung