he has two sons() are collage students.A both of whom B neither of whom C both of them

题目

he has two sons() are collage students.A both of whom B neither of whom C both of them
D neither of them
why?

答案

选择C
A/B都用了whom这种宾格形式,是不对的
D neither表示否定 要用单数谓语动词 应该接is,而不是题目中的 are.
综上,选C