11.D
12.C
13.D
14.A
15.A
16.B
17.B
18.A
19.B
20.A
21.B
22.A
23.B
25.conservation
26.homeless
28.picturesque
29.T
30.F
31.F
32.T
33. If I were Mary, I would apply for that job
34.The first satellite was put into the earth orbit by the Soviet Union
35. Because of a crack in the water pipes, the water bill was enormous
36.Although I have difficulties, I never lose heart
                                                                           Test 3 
1.B
2.D
3.B
4.B
5.D
6.A
7.B
8.A
9.B
10.C
11.A
12.C

13.B
14.B
15. D
16. A
17. C
18. A
19. A
20. D
21. A
22.A
23.D
24.B
25.unpolluted
26.relaxing
27.economic
28.examination
29.F
30.T
31.F
32.T
33. Football is said to be the best game to play
34.Unless there is enough water, tree won't grow
35.Tom has started to read this book for three days
36.I suggest playing some games of tennis
                                                           Test 4  

1.C
2.A
3.C
4.C
5.B
6.C
7.C
8.C
9.C
10.B
11.D
12.C
13.C