单选题 11. What we all know is that the old scientist, ______ life was hard in the past, still works very hard in his eighties.

A、 for whom
B、 for him
C、 for whose
D、 for which

【正确答案】 A

【答案解析】 考查定语从句。句意：我们所知道的是，那位老科学家过去生活很艰辛，现在都八十岁了仍在艰苦工作。that引导的是表语从句，the old scientist still works very hard in his eighties. 是主句，life was hard in the past是定语从句，先行词是the old scientist。故选A。