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The room is so clean and neat ;you _______a thorough cleanin

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The room is so clean and neat ;you _______a thorough cleaning
A must have given it
B should have given it
C had given it
D have given it
少了个 yesterday
The room is so clean and neat ;you _______a thorough cleaning yesterday
The room is so clean and neat ;you _______a thorough cleanin
选A.因为must have done表肯定推测,你一定彻底清理过了.should have done表本应做某事却没有做;C、D在此处不符合语境,直接排除.