单项选择3 语法和词汇知识（共15小题）

    从每小题的A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
11. We often put one of the fingers to our lips as a ______ to be quiet.
   A. mark    B. symbol    C. meaning    D. sign
12. ______ the students are doing their maths exercises with the help of the teacher.
   A. Three score of                 B. Three scores
   C. Score of                      D. Scores
13. Nobody could understand her though she tried to ______ his idea by using
 the simplest English, because they are foreigners.
   A. display      B. convey        C. say           D. speak
14. It’s very common ______ adolescents like to try new things.
   A. when       B. as            C. that           D. what
15. --Who won the first prize at the poetry competition? Li Ping or Zhang Ping?
   -- Zhang Ping did. But Li Ping ______ it if he ______ more, as he has a great
talent for writing poems.
  A. could have won; had practised     B. could win; practised
  C. should have won; could have won  D. would win; had practised
16. Many parents complain that children ______ the TV hopelessly.
  A. are becoming addicted to         B. have become addicted to
  C. have become addicted with       D. have addicted to
17. You may catch up with others ______ you work a little harder.
  A. so long as     B. so far as       C. however       D. unless
18. --What’s the matter with the boy?  He seems unhappy.
   --He was given a good lesson by his father. It was ______ computer games
      took the boy a lot of time that he ought to have spent on his lessons.
  A. to have played; which          B. having played; that
  C. playing; that                  D. played; hardly
19. My colour TV set is only one year old and it is still under ______.
  A. repair       B. safety         C. help           D. guarantee
20. ______ in the dark building for more than 5 hours, the thief looked pale
and terrified. 
 A. Trapping    B. Having trapped   C. Have trapped   D. Trapped
21. ______ it happen, what ______ we do?
  A. Should; would                B. Were; should
  C. Would; should                D. Had; would
22. The couple ______ the noise and pollution any longer, so they moved to settle in the countryside after they retired from work.
  A. couldn’t come up with        B. couldn’t put up with
  C. didn’t get along well with      D. didn’t put up with
23. As is known to all, trees and beautiful scenes can ______ our spirits whenever we see them.
  A. raise       B. encourage     C. refresh        D. arouse
24. He is ______ careless a student that he often ______ some letters while writing.
  A. such; leaves on              B. so; leaves off
  C. so; leaves out               D. such; leaves out
25. The pretty girl is always busy helping her mother with the housework ______ I go to visit her family.
  A. every time                 B. every time when  
  C. at every time               D. However time

Key: 11—15  DABCA     16—20  BACDD   21—25  ABCCA