—Istheletterfromyourmother?—Yes.Butshe

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问题详情:

—Istheletterfromyourmother?—Yes.Butshe

—Is the letter from your mother?

— she ________the letter herself,because she doesn’t even know one word.

A.needn’t have written            B.can’t have written

C.might not have written           D.should not have written

【回答】

B 解析: 考查情态动词。句意为:——这封信是你母亲写来的吧?——是的。但这封信不可能是她自己写的,因为她一个字也不认识。根据because引导的原因状语从句可知,此处应用can’t have done表示对过去发生的事很有把握的否定推测。


知识点:虚拟语气与情态动词

题型:选择题

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