46. What is the main idea of this passage? （ ）________________________________________
A. It is not customary to telephone someone in the morning and in sleeping hours in the U.S.
B. The role of time in social life over the world.
C. If people are not prompt, they may be regarded as impolite or not fully responsible in the U.S.
D. Not every country treats the concept of time as the same.
因为翻译机器 语法不通 看不懂 所以请高手 人工翻译
