考试
2020-03-16 06:45:53

821 Her parents______her lette

题目描述

Her parents______her letter last week. They dont know what has happened toA.must receiveB.



Her parents______her letter last week. They dont know what has happened to

A.must receive

B.must have received

C.ought to receive

D.ought to have received

请帮忙给出正确答案和分析,谢谢!

答案解析

D本题考查情态动词,根据题意,他的父母本

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