Question

She brought with her three friends, none of ______ I had ever met before.

A. them        B. who        C. whom          D. these

Answer 1

C

解析:

考查關系代詞。分析句子結構可以看出“none of ______ I had ever met before”是非限制性定語從句，修飾three friends。Of是介詞，之后要用表示人的關系代詞whom。