38 A

39 D

40 A

41 D

42 C

27 B

28 B

29 B

30 D

31 B

32 B

33 D

34 B

35 A

36 A

37 A

1 His not knowing a foreign language made it difficult for him to get a well-paid job

2 The air in many areas is so unclean that people have to wear masks when going out on the streets.

3 Air pollution leads to the greenhouse effect and makes the temperature of the earth's surface higher.

6 What did you buy at the supermarket last week?

7 There were many people at the party last night.

8 They lived here two years ago.

9 Nga was late for school yesterday morning.

10 Did you go to the zoo yesterday?

1 She bought a new car last week.

2 They lived here two years ago.

3 Nga was late for school yesterday morning.

4 He didn't see you at the party last night.

5 Were you absent yesterday?

16 D

17 C

18 A

19 D

20 D

11 A

12 D

13 A

14 C

15 B

6 B

7 C

8 A

9 C

10 A

1 A

2 A

3 D

4 D

5 D

4 C

5 D

6 D

7 C