Question

His parents were teachers in that school, _______ lost their lives in order to save  their students in the earthquake.

A. none of them     B. both of them       C. none of whom   D. both of whom

Answer

D

【解析】

试题分析：句意：他的父母都是这个学校的老师，他们两个在那次地震中为了挽救学生而失去了生命。因为逗号的前后都是句子，所以缺少连词，them是代词，不是连词，故排除AB；none 表示三者以上都不，这里指父母两个人，所以排除C，both表示两者都，both of whom lost their lives in order to save  their students in the earthquake. 是定语从句，修饰先行词parents，whom既代替parents又能起连接的作用，正符合题意，故选D。

考点：考查定语从句的用法。