My wallet is nowhere to be found. I ______ when I was on the bus.A、must have dro

游客2025-03-17  1

问题 My wallet is nowhere to be found. I ______ when I was on the bus.

选项 A、must have dropped it
B、must drop it
C、should have dropped it
D、ought to have dropped it

答案 A

解析 情态动词。“must+have+过去分词”表示对过去发生的事情的推测。
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