—Do you know the girl with our English teacher often?— Yes, her name is Helen.A. whom to t

—Do you know the girl with our English teacher often?
— Yes, her name is Helen.
A. whom to talk
B. who talks
C. who is talking
D. whom talks

A. whom to talk(答案→)B. who talksC. who is talkingD. whom talks解析：句意：你认识这个经常和我们的英语老师谈话的女孩吗？——是的，她的名字叫海伦。结合语境可知上文中先行词the girl为定语从句的逻辑主语，故引导词用who。根据时间状语可知定语从句中描述的是经常性的动作，故用一般现在时态。故选B。

就是这个解释