位置:首页 > 题库频道 > 学历类 > 升学考试 > 高中(高考) > 英语 > 高考英语其它练习471

The old professor has three sons,________are doctors.

发布时间:2021-08-02

A.all of them

B.all of whom

C.all of that

D.all of which

试卷相关题目

返回顶部