问题标题:
【定于从句问题①Hehasthreesons,noneof__A___isadoctor.②Hehasthreesons,butnoneof___B_isadoctor.③He】
问题描述:
定于从句问题
①Hehasthreesons,noneof__A___isadoctor.②Hehasthreesons,butnoneof___B_isadoctor.③Hehasthreesons,____D___aredoctors.
④Hehasthreesons;_C___are
doctors.
A.whomB.themC.theyD.who
告诉我为什么这样填?
宋汐瑾回答:
介词+whom,them,他们是宾格形式
they,是主格,充当主语
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