Friends play an important part in our lives, and although we may make the fact of friendship for granted, we often don't 【S1】______ clearly understand how we make friends. While we get on well with a number of people, we are usual friends with only a few 【S2】______ —for example, the average among students is about 6 per person. Moreover, a great many of relationships come under the general 【S3】______ term 'friendship'. In all cases, two people like one another and enjoy being together, but beyond that, the degree of closeness among them and the reasons for their interest in each other vary 【S4】______ greatly. At the beginning, little depends on how people meet, and on 【S5】______ good first impressions. As we get to know people, we consider things like age, race, looks, economic and social status, and intelligence. Although these factors are not the greatest importance 【S6】______ it is more difficult to have a good relationship with people when there is a big difference from age and background. 【S7】______ We pay attention to actual behavior, facial expression, and the way a person speaks. Friends will stand close together and 【S8】______ will spend more time looking at each other than ordinary acquaintances. Smiles and soft voices also express friendliness, and it is because they may give the wrong signals that shy people often have difficulty in making friends. A friendly look at the 【S9】______ wrong facial expression can turn into an unfriendly stare, and nervousness may be wrongly understood as friendliness. People 【S10】______ who do not look one in the eye are not trusted when, in fact, they simply ;do not have confidence. 【S1】