I can’t find the key to my office, ______ have lost it on my way home.

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问题 I can’t find the key to my office, ______ have lost it on my way home.

选项 A、would
B、should
C、must
D、ought to

答案C

解析本题主要考查对情态动词must用法的掌握。情态动词must+完成时，用来表示对过去发生的事情的推测，故答案选C。

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大学英语三级B级

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