Do you know the young lady your mother is talking?A. whoB. whomC. with whomD. which

问题补充：

Do you know the young lady your mother is talking?

A. who

B. whom

C. with whom

D. which

答案：

A. who

B. whom

(答案→)C. with whom

D. which

解析：本题修饰年轻的女士为定语从句，先行词为人，关系词做介词with的宾语应使用whom，talk with 表示和某人谈话的含义，故本题选C。