请把下列单词变为原形。A:Hello.B:Hello.IsthatBaiLing?A:Yes.Hi,Tom.Whatareyoudoing?B:I’mreadingastorybook.sleepingstandingjumpingwalkingsittingWhatishedoing?Heisrunning.sweepingcleaningwashingB:Hello.A:Hello.IsthatXingxing?B:Yes.Hi,Peter.A:Where’sLiuTao?B:He’sinthebedroom.A:Whatishedoing?B:He’ssleeping.