--- Hi, Grandma, why do you look so tired? --- I’m tired. I the cleaning all morning.A.

发布时间：2020-08-15 02:48:33

--- Hi, Grandma, why do you look so tired?
--- I’m tired. I      the cleaning all morning.
A. did
B. had done
C. have been doing
D. have done

网友回答

A. did
B. had done
(答案→)C. have been doing
D. have done
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