—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一定做過某事，用于肯定句中，疑問句否定句中用can或could來代替，表示對過去事實比較肯定的猜測。might have done可能做了某事，用于肯定句和否定句中，表示對過去事實不太肯定的猜測。由I’m not sure可知并不肯定，故選D。
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