问题
选择题
By serving others，a person focuses on someone other than himself or herself，______ can be very eyeopening and rewarding.
A．who
B．which
C．what
D．that
答案
答案：B
后面一句是非限制性定语从句，从句缺少的是主语，先行词是前面整句话的内容，所以用which引导。句意：通过为别人服务，一个人就会关注某人而不是他/她自己，这样也许就能使眼界非常开阔并获得回报。