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My wallet is nowhere to be found. I ______ when I was on the bus.
My wallet is nowhere to be found. I ______ when I was on the bus.
admin
2008-11-13
37
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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0
成人本科学位英语
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