Unit 1 Book 3FriendshipI. Difficult Sentences1. When we approach the notion of friendship, our first problem is that there isa lack of socially acknowledged criteria for what makes a person afriend. (1) What are “socially acknowledged criteria”?(=“Socially acknowledged criteria” are established standards that are accepted by all the people in the society.) (2) Translate this sentence.(=我们探讨友谊这个概念时，遇到的第一个问题是，没有社会公认的择友标准。)2. In one setting, we may describe someone as a frien
