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—Hey,thewashinguphasbeendone!—That

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问题详情:

—Hey,thewashinguphasbeendone!—That

— Hey, the washing up has been done!

— That ________ Cynthia. She's always helpful.

A. need have been  B. could have been  C. should have been  D. must have been

【回答】

D

知识点:虚拟语气与情态动词

题型:选择题

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