1.B 2B 3.C 4.D 5.A

6.C 7.D 8.B 9.C 10.C 11.B 12.C 13.B 14.C 15.D

16.C : are going -> is going

17.B : will held -> will be held

18.A : whom -> who

19.D : do -> don't 

20.A : meet -> met

21. He hasn't smoked for three years

22. A new computer has just been bought by my parents

23. If I had enough time, I could finish my test

1.D 2.D 3.C 4.B 5.A

6.D 7.A 8.B 9.D 10.B 11.D 12.C 13.A 14.A 15.B

16.C : when -> since

17.C : was used to -> used to

18.D : doesn't he -> isn't he

19.B : did I go -> I went

20.A : won't -> don't

34. I wish I had a computer at home

35. The teacher asked me if I was having a wonderful time there

37. This washing machine was used by no one last night / This washing machine wasn't used by anyone last night

38. My sister has learnt English for  5 years