题目内容：

意思By serving others,a person
focuses on someone other than himself or herself,______ can be very eye-opening
and rewarding.(湖南2007)
A.who B.which C.what D.that

优质解答

选B
which这里作关系代词引导的是非限制性定于从句,前面的整个一句话作为先行词,which即代表它前面那句话
（译文：通过为他人服务,一个人能够把精力集中到另一个人身上而不是自己,这是很开明和有价值的.）