My mobile phone is nowhere to be found.I (drop) ______ it when I was on the way

游客2024-07-07 25

问题 My mobile phone is nowhere to be found.I (drop) ______ it when I was on the way home.

选项

答案 must have dropped

解析表示对过去事实的肯定判断用must have done。

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I’msorry,sir.Yourmobilephoneisn’treadyyet.It(repair)______inthefac