第二节语法填空(共10小题；每小题l 5分．满分l5分)
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号为16—25的相应位置上。
In social life, time plays a very important part．In the U.S.A.,guests tend to feel they are not highly regarded if the invitation  16         a dinner party is extended only three or four days  17          the party date．But it is not true in all countries．In   18        areas of the world, it may be considered foolish to make  19          appointment too far in advance because plans that are made for a date more than a week away tend                 20            (forget)．The meaning of time differs in different parts of the world．Thus, misunderstandings arise between people from cultures  21          time is treated differently．Promptness is valued highly in American life, for example．If people are not punctual, they may be regarded as impolite or not fully  22            (responsibility). In the U.S.A. no one would think of keeping a business associate  23           (wait) for an hour;   24           would be too impolite．A person who is 5 minutes late will say a few words of explanation,  25          perhaps he will not complete the sentence．