16. What we used to think ______ impossible now does seem possible.
    A. is   B. was   C. has been   D. will be
17. The young girl sitting next to me on the plane was very nervous. She ______ before.
    A. hasn’t flown       B. didn’t fly
    C. hadn’t flown       D. wasn’t flying
18. When the old man _____ to walk back to is house , the sun _____ its behind the mountain.
    A. started; had already hidden
    B. had started; had already hidden
    C. had started; was hiding
    D. was starting; hid
19. --- Hi! Where you are going!
--- What’s wrong ?
--- The r road repairs ______ .
    A. haven’t complete                     B. weren’t completed
    C. haven’t been completed                D. didn’t complete
20. My uncle ______ in Beijing for over 10 years. Now he lives in his hometown in Fuzhou.
    A. has worked        B. worked     C. had worked        D. works
21. --- Jim, have you finished reading Harry Potter and Half-Blood Prince ?
--- No. I ______ my father on the form all yesterday.
    A. would help        B. had helped
    C. was helping       D. have been helping
22. I _______ along the street looking for a place to park when the accident _______ .
    A. went; was occurring                       B. went; occurred
    C. was going; occurred                       D. was going; had occurred
23. By the time Jane gets home, her aunt ____ for London to attend a meeting.
    A. will leave      B. leaves        C. will have left       D. left
24. I think it is necessary for my 19-year-old son to have his own mobile phone, for I  sometimes want to make sure if he _____ home for dinner.
    A. come         B. comes         C. has come         D. will come
25. --- ______leave at the end of this month.
--- I don’t think you should do that until ______ another job.
    A. I’m going to ;  you’d found                 B. I’m going to ;  you’ve found
    C. I’ll;  you’ll find                           D. I’ll ;  you’d find
26. As soon as he comes back, I’ll tell him when ______ and see him.
    A. you will come                         B. will you come
    C. you come                            D. do you come
27. What he wants to know is when and where the project _______ .
    A. is started                                B. is to start
    C. has started                               D. is to be started
28. The new type of cellphone ______ better if it is advertised on TV.
    A. will sell         B. sells     C. would sell         D. sold
29. Let’s keep to the point or we _____ any decisions.
    A. will never reach                          B. never reached
    C. have never reached                        D. never reach
30. Jimmy needs to improve his technique if he ______ gold at 2008 Olympics.
    A wins           B. is winning     C. will win           D. is to win

Keys:

1-5 ADCDB  6-10 AADBB  11-15 CDCAA 
16-20 BCACB 21-25 CCCDB  26-30 ADAAD