American women usually identify their best friends as < >someone they can talk frequently.

题目

American women usually identify their best friends as < >someone they can talk frequently.
A,who B,as C,about which D,with whom请解释一下各个选项对或不对的原因.

答案

D.
因为是talk with
所以介词with不能少,whom宾格,聊天的对象
which不会拿来指定人,排除C,而且talk about 是谈论.
其他选项更乱七八糟,就不用解释了
who是主格,这里需要宾格,而且没介词with