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，满分15分）
从A、B、C、D四个选项中选出最佳选项，并将答案填入答题卡中。
21. --When can I come for the photos? I need them urgently.
-- In two hours. ________.
A. That depends. B. It depends on how fast we develop the film.
C. It depends on us D. You can depend on us.
22. _____ good knowledge of first aid can make ______ real difference before doctors come .
A. The, a B. /, a C. A, / D. A, a
