---Ididn'thearthephone．---I________asleep．A.mustbeB.musthavebeenC.shou

发布时间：2020-08-07 01:39:01

---I didn't hear the phone．---I ________ asleep．A.must beB.must have beenC.should beD.should have been

网友回答

B解析没听到电话声，肯定是睡着了，所以用must have done。
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