The alarm clock didn’t ring this morning. You ______ it last night.

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问题 The alarm clock didn’t ring this morning. You ______ it last night.

选项 A、need to have forgotten to wind
B、may have forgotten winding
C、ought to have forgotten to wind
D、must have forgotten to wind

答案D

解析今天早上闹钟没响，你一定是昨天晚上忘了上弦。must have done肯定猜测，forget to do忘记要做。

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英语

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