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 —Has your father got up?
—Sorry, I’m not sure. He __________ got up. Please go and see for yourself.
A.must haveB.can’t haveC.would haveD.might have
D
must have done一定做过某事,用于肯定句中,疑问句否定句中用can或could来代替,表示对过去事实比较肯定的猜测。might have done可能做了某事,用于肯定句和否定句中,表示对过去事实不太肯定的猜测。由I’m not sure可知并不肯定,故选D。
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