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，并在答题卡上将该项涂黑。
21.They have their reasons for keeping their marriage secret for moment.
A. the; a B. the; the C. a; the D. a; a
22. Tom's mother kept telling him that he should work hard, but
A. he B. which C. she D. it
23. You have to read the latest magazines
A. keep off B. keep up C. keep down D. keep back
