第二部分 英语知识运用（共两节；满分45分）
第一节：语法和词汇知识（共15小题；每小题1分，满分15分）
21. --- Excuse me, Sir. Is the city library open all day?
--- ________ . Only from 8:00a. m. to 5:00 p. m.
A. That’s right. B Yes, of course. C Sorry, I am not sure D Sorry, I am afraid not
22. Our office is in a terrible mess; it _____ cleaned.
A. can’t have been B. mustn’t have been
C. shouldn’t have been D. wouldn’t have been
23. --- The sign says no one _______ park here.
--- Oh, I’m sorry.
A. will B. shall C. need D. must
