—How clean the room is! —Yes,I am sure that someone _______ it. A.cleans B.clea...
—Howcleantheroomis!—Yes,Iamsurethatsomeone_______it.A.cleansB.cleanedC.hascleanedD.ha...
—How clean the room is! —Yes,I am sure that someone _______ it. A.cleans B.cleaned C.has cleaned D.had cleaned
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