Which of the following factors does the author believe are very important in developing friendships? A．Age and background B．Economic and social positions C．Race and looks D．Same interests and behavior
A.Age B.Economic C.Race D.Same
【参考答案】
A 解析：本题是细节考查题。题目是：在如下的因素中，哪个是作者认为对建立友谊很重要的因素?选A的依据是第三段最后......