请阅读下面短文,根据语篇内容,在方框内的缩写文章中,填入与短文意思最符合的单词,并将答案写在答题卡相应的位置上.每空一词.
Friends play an important part in our life.Although we think it\’s natural and nor-mal to have friends,we often don\’t have a clear understanding of how we make friends.
While we get on well with a number of people,we are usually friends with only several people.For example,the average（平均） number of friends among students is about 6.In a friendly relationship,two people like each other and enjoy being together,but whether they are close friends depends on more things like age,economic condition,social position,and intelligence.Although they are not the most important,it is more difficult to get on well with people when there is a big difference among them.
Some relationships can be kept on argument and discussion,but it is more important for close friends to have attitudes and interests in common.They often talk about"being on the same wavelength（波长）".It usually takes time to reach this point.People want to help friends and hate to break a promise.This helps them believe one another.