问题
选择题
The old man has three sons，and two _____ are doctors．
A．of which
B．of whom
C．of them
D．of that
答案
答案：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。
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The old man has three sons，and two _____ are doctors．
A．of which
B．of whom
C．of them
D．of that
答案：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。