问题补充：
In a ,we can read many kinds of books ,but you must keep quiet there.
A. pay phone
B. restaurant
C. post office
D. library
答案：
A. pay phone
B. restaurant
C. post office
(答案→)D. library
解析：根据后文的说明内容we can read many kinds of books ,but you must keep quiet there.可知答案为D，表示在···图书馆的意思。
