1.He has made a lot of promises,none of ( )carried out.2.He has three sisters,( )is a doctor.

问题描述:

1.He has made a lot of promises,none of ( )carried out.2.He has three sisters,( )is a doctor.
1.A.them B.which
2.A.all of them B.all of whom C.none of whom
并分析不同之处

1.A.them 选B得话后面得加谓语 are
2.C.none of whom 根据从句谓语 is 只能选C为什么要加谓语are,第一个句子是什么句第一句 none of them carrried out ,them 做promises 的同位语, carried out 后置定语。如果用which就是定语从句,从句必须要有完成的主谓语