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4 If you aren't alert, you computer will be infected with viruses
5 If we use much pesticide on vegetables, they will become poisonous
9 Because Nam needs to improve his social skills, he attends the activity
11 How about using public buses instead of motorbike
12 They enjoy protecting the environment unpolluted
15 Mr Brown was disappointed that his son didn't write to him
If I didn't have to go to class today, I would visit my friends
33 If you don't water these plants, they will die
34 Mary asked me if she could borrow me some money because she wanted to buy that shirt
35 The old man whose bicycle I borrowed yesterday is working in this factory
36 In vietnam, Basketball isn't as popular as football
1 B
2 C
3 A
4 A
5 D
6 D
7 A
8 A
9 C
10 C
11 B
12 C
13 B
14 B
15 C
16 C
17 C
18 B
19 B
20 D
21 A
22 A
23 A
24 B
25 B
26 C
27 A
28 D
29 B
30 A
31 A
32 B
33 C
34 D
35 B
1 D
2 A
3 B
4 A
5 C
6 D
7 A
8 B
9 C
10 D
11 A
12 B
13 B
14 B
15 A
16 B
17 B
18 A
19 B
20 D
21 D
22 C
23 D
24 A
25 C
26 A
27 C
28 B
29 A
30 D
31 A
32 B
33 A
34 B
35 A
36 A
37 A
38 B
39 D
40 A
41 A
42 B
43 B
44 B
45 D
46 A
47 A
48 B
49 D
50 D
9. Mr. John said to his wife not to be so silly.
Mr. John told his wife not to be so silly
Tom asked the girl when she had had that picture taken