Ⅱ语言知识及应用（共三节，满分55分）
第一节 单项选择(每小题1分，满分10分）请根据题意,从21--30各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。
21. The company had about 20 notebook computers but only one-third __________ used regularly. Now we have 60 working all day long.
A. is B. are C. was D. were
22. No one can avoid _______ by one’s surroundings. So the students sat there, ______________ what to do.
A. to be influenced; doesn’t know B. having influenced; not know
C. being influenced; not knowing D. influencing; didn’t know
23. While watching television, ___________________.
A. the doorbell rang B. the door bell rings
C. we heard the doorbell ring D. we heard the door bell rings
24. – Did you go to the show last night?
