Question

The old man has three sons，and two _____ are doctors． A．of which B．of whom C．of them D

The old man has three sons，and two _____ are doctors． A．of which B．of whom C．of them D．of that

Answer 1

C

考查代词。根据句中连词and可知，后面连接并列分句，非考查定语从句，故用代词them，指代three sons。句意：老人又3个儿子，2个是医生。