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I didn't hear the phone. I _____ asleep. [ ]A. must be B. must have been C. should be D. should

题目简介

I didn't hear the phone. I _____ asleep. [ ]A. must be B. must have been C. should be D. should

题目详情

I didn't hear the phone. I _____ asleep.

[ ]

A. must be
B. must have been
C. should be
D. should have been

题型：单选题难度：中档来源：模拟题

答案

B

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