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, 在空格处填人一个适当的词或使用括号中词语的正确形式填空。

    Some people prefer to make friends with people who are very much like them while others prefer friends who are very different. There are advantages of both types of ____ (friend). If a man ____ (choose) a friend similar to himself, there is no problem that they will share many common interests. They may have similar goals in life. This means that they will be able ____ (help) each other in achieving their goals. Two people who are very similar will feel ____ (comfort) with each other and may understand each other's feelings better. ____ (they) friendship may be deeper and last longer.

    There are also many advantages of ____ (make) friends with someone of opposite interests and even character. In this type of friendship, the two people complement(补充) each other. If one is weak in some ways, ____ other is strong. Two people ____ similar goals may find themselves in competition, ____ those who want different things can always support each other. Those who have different interests can ____ (introduction) each other to new experience and so enrich(丰富) their knowledge.

    A friend who is unlike me may be challenging, but a similar friend is familiar and safe.