28.D
29.A
30.C
31.B
32.B
33.C
34.A
35.A
46.B
47. B
48.C
49.C
50. C

36. Is it necessary for me to fill in any form?
37. I need to post this letter tonight
38. This is such a good food that I'm going to have some more
39. I asked them why they had not mentioned the problem before
40. If you did enough exercise, you would not be unfit
41. I bought myself some good new clothes which I need for my new job
42. I wish I could go to the game next Saturday
43. I really wish I had invited her to the party
44. He isn't old enough to go to school alone
45. He wishes he could pass the exam

36. Is it necessary for me to fill in any form?
37.I need to post this letter tonight.
38.This is such the good food that I'm going to have some more.
39.I asked them why they hadn't mentioned the bproblem before.
40.If you did enough exercise, you would be fit.
41. I bought myself some good new colthes which I need for my new job.
42. I wish I could go to the game next Sunday.
43. I really wish I had invited her to the party.
44. He isn't old enough to go to school alone.
45. He wishes he could pass the exam.

46.B
47.B
48.C
49.C
50.C