In the United States,it is not customary to telephone someone very early in the morning.If youtelephone him early in the day, while he is shaving or having breakfast, the
time of the call shows that the matter is very important and requires immediateattention.The same meaning is attached to telephone calls made after 11:00 pm.Ifsomeone
receives a call during sleeping hours, he assumes it's a matter of life ordeath.The time chosen for the call communicates its importance.
In social life, time plays a very important part.In the U.S.A.guests tend tofeel they are not highly regarded if the invitation to a dinner party isextended only three or four
days before the party date.But it is not true in all countries.In other areasof the world, it may be considered foolish to make an appointment too far inadvance because plans
which are made for a date more than a week away tend to be forgotten.Themeaning of time differs in different parts of the world.Thus, misunderstandingsarise between
people from different cultures that treat time differently.Promptness is valuedhighly in American life, for example.If people are not prompt, they may beregarded as
impolite or not fully responsible.In the U.S.no one would think of keeping abusiness associate waiting for an hour, it would be too impolite.A person, whois 5 minutes
late, will say a few words of explanation, though perhaps he will not completethe sentence.

What is the mainidea of this passage? _________

A.It is not customary to telephone someone in the morning and in sleeping hoursin the U.S.

B.The role of time in social life over the world.

C.If people are late, they may be regarded as impolite or not fully responsiblein the U.S.

D.Not every country treats the concept of time as the same.