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l分，满分l5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，并在答题卡上将该项涂黑。
21. — What about going to the theatre this evening? — _________ .
A. Help yourself B. That’s all right C. Good idea D. Not at all
22. Not only _____ a promise, but also _______ it.
A. did he make; he kept B. he made; he kept
C. does he make; does he keep D. he has made; has he kept
23. She didn’t answer the telephone , she asleep .
A. must fall B. must have fallen
C. should have fallen D. can have fallen
