20.-----Is Miss White working these days?

　------No. It is two months since she worked here.

　------Oh,_____________?

A. where is she working now　 B. would you please show me the way

C. which is her office　　　 D. is she ill

19.-----I always take care when doing papers on the computer.

　-----You meant it! One can not be　 _______careful working on it.

A. too　　 B. very　 C. so　　 D. quite

18.-----The exam wasn’t difficult, was it?

　------No, but I don’t think ______could pass it.

A. somebody　 B. anybody　 C. everybody　 D. nobody

17. It was twelve o’clock at midnight _______ they arrived at a lonely village.

A. that　 B. before　　 C. since　　 D. when

16.Students shouldn’t be given so difficult a problem _____ they can not work out.

A. that　 B. which　 C. while　 D. as

15.The students expected __________ more reviewing classes before the final exams.

A. it would be　 B. there being　 C. it to be　 D. there to be

14. -----Did you meet with the famous space hero, Yang Liwei?

　 ------______I had come here earlier!

A. If only　 B. If not　 C. But for　 D. For fear

13.No sooner _____ themselves in their seats in the theatre ______ the curtain went up.

A. they have settled; before　 B. had they settled; than

C. have they settled; when　　 D. they had settled; than

12._____his age, he did it quite well, so don’t ______ him any more.

A Given; blame　 B. Considered; say　 C. To regard; scold　 D. Considering; speak

11.-----Who on earth could it be?

　------It was _______ other than Clint Eastwood.

A. none　 B. nothing　 C. not　 D. nobody