第二部分 英语知识运用(共两节, 满分45分)
第一节 单项填空(共15小题;每小题1分,满分15分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
21. [2012九江模拟]—Excuse me, where can I get ________ application form?
—Go to ________ Window 10, please. 
A. an; 不填                                B. an; the
C. 不填; 不填                           D. the; the
22. [2012桐乡模拟]—Did you wait for him long?
—No, I hadn’t waited long ________ he appeared.
A. unless                                     B. until
C. before                                    D. since
23. After a fire broke out in the lab,a lot of equipment ________ .
A. is damaged                             B. had damaged
C. damaged                                D. was damaged
24. It is convenient to live near downtown. ________ ,it is full of noise and dirty air.
A. Because                                 B. Therefore
C. Meanwhile                             D. On the other hand