题目内容
By serving others, a person focuses on someone other than himself or herself, ___________ can be very eye-opening and rewarding.
A. who B. which C. what D. that
B
解析:
which引导非限制性定语从句,指代整个句子。在非限制性定语从句中,必须用which引导,而不用that引导。who引导定语从句时,其先行词是表示人的名词。what不用于引导定语从句,而用于引导名词性从句。
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