My cell-phone has disappeared. Who ____ have taken it away?

A. could
B. should
C. must
D. might
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科目:高中英語(yǔ) 來(lái)源:專(zhuān)項(xiàng)題 題型:單選題

My cell-phone has disappeared. Who ____ have taken it away?
[     ]
A. could
B. should
C. must
D. might

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