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. Paul doesn’t have to be made ____________. He always works hard.
A. study B. to study C. studied D. studying
22. ---- Who ________it be that hasn’t handed in his homework?
---- It ______ be Bob. He handed it in yesterday.
A. can; mustn’t B. must; can C. can; can’t D. may; must
