Question

Do you know the young lady ____ your mother is talking?

A．who

B．whom

C．with whom

D．which

Answer 1

C

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。