题目：
Questions
·Look at the ten statements for this part.
·You will hear a story about communication through time.
·Decide whetheryou think each statement is right(R) wrong(W) or not mentioned(NM).
·You will listen to it twice.
In the U.S., it is customary to telephone friends and acquaintances during the early hours of the morning.
A. Right
B. Wrong
C. Not Mentioned
答案：
参考答案：B
解析：
The Voices of Time
