听力原文：For how many hours is the public library open on weekdays?
(4)
A．Yes, it is.
B．No, it isn't.
C．About 10 hours.
D．About 10 o'clock.

A.Yes,
B.
B．No,
C.
C．About
D.
D．About
E.


【参考答案】

C
解析：题干问的是“公共图书馆开放多少个小时”，所以C为正确。