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

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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
再问: 为什么要加谓语 are,第一个句子是什么句
再答: 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