第二部分英语知识应用（满分45分）
第一节 单项填空（共15小题；每小题1分，满分15分）
21. Some people fear that ______ air pollution may bring about changes in ______ weather around the world.
A. /; the B. the; / C. /; / D. an; the
22. ______ different ideas, we are now getting closer to the answer.
A. Tried out B. Trying out C. To try out D. Having tried out
23. I witnessed the whole terrible accident, so I was taken to the police station and described it ______.
A. at random B. in force C. at length D. in vain
24. Stage fright is a common example of ______ educators call a “lack of confidence” among students.
A. that B. what C. which D. whose
25. — I was late for work this morning.
— ______? You started early, didn’t you?
A. Why not B. So what C. How come D. What for
26. Do you expect ______ a possibility that we shall be able to afford the particular furniture we need?
