I. 单项选择。（每小题1分，共15分）
从每小题所给的A、B、C、D四个选项中选出可以填入空白处的最佳选项。
( ) 21. — Excuse me. Do you know where I can save money? — Sure. There is a _______ on Green Street.
A. store B. bank C. post office D. library
( ) 22. — Excuse me. Could you tell me _____ to get to the bookstore?
— Sure! Go along this street, and then turn left.
A. where B. what C. how D. if
( ) 23. — Excuse me. Where is the restaurant?
— It is ______ the store and the post office.
A. in B. between C. after D. at
( ) 24. — _______ you like the mall?
— Because it’s very crowded.
A. Why don’t B. How don’t
C. How do D. Why not
