She brought with her three friends none of I had ever met before. A. themB. who C. thes

问题补充：

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

A. them

B. who

C. these

D. whom

答案：

A. them

B. who

C. these

(答案→)D. whom

解析：考查非限制性定语从句。根据逗号可知，是非限制性定语从句，A、C不能引导定语从句，排除A、C；介词of后加which指物，加whom指人，先行词是three friends，故选D。