20、The light will be thrown ______ the cause of cancer by research that is now in progress.

      A. to                             B. upon                         C. in                       D. for

19、When you are reading fast, your eyes will be one or two word groups ahead of ______ your mind is taking in.

      A. one                           B. others                       C. the others            D. the one

18、―Darling, our friend has arrived.

―I’m on the way ______ home. You try to make himself ______ home first.

      A. /; /                            B. to; at                         C. /; at                    D. at; by

17、 Does mass _______________ (失业) depress wages? 

二、选择题

（每空？ 分，共？ 分）

16、―Would you like to join me for a quick lunch before class?

― ______, but I promised Nancy to go out with her.

A. I’d like to                     B. I like it.                 C. I don’t                  D. I will

15、A modern city has been set up in       was a wasteland ten years ago .

A. what           B. which          C. that           D. where

14、Anyway, that evening, ____ I’ll tell you more about later, I ended up staying at Rachel’s place.

A. when                  B. where                 C. what                  D. which

13、― Let’s go and have a good drink tonight.

―      Have you got the first prize in the competiton?

A. What for?      B. Thanks a lot. C. Yes, I’d like to.            D. Why not?

12、

I failed in the final examination last term and only then      the importance of studies.

A.I realized     B.I had realized       C.had I realized      D.did I realize

11、― One week’s time has been wasted.

― I can’t  believe we did all that work for        .

A. something      B. nothing       C. everything      D. anything