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，共15分）
从每题所给的A. B. C.D四个选项中，选出可以填入空白处的最佳选项，并在答题卷上做答。
21. The Anti-Japanese War _________ in 1937.
A. broke down B. broke in C. broke out D. broke up
22. _________ in the regulations that you should not tell other people the password of your e-mail account.
A. What is required B. What requires C. It is required D. It requires
