She brought with her three friends none of I had ever met before.A. them B. whoC. whom D

问题补充：

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

A. them

B. who

C. whom

D. these

答案：

A. them

B. who

(答案→)C. whom

D. these

解析：答案：C。考查定语从句。根据逗号后没出现表示并列句的连词可知此句是非限制性定语从句，排除选项A和D；介词后接whom而不是who，故C项正确。