选择:You have been doing washing all the morning.You must be tired,( )you?A.mustn`t B.are C.aren`t D.must

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选择:Youhavebeendoingwashingallthemorning.Youmustbetired,()you?A.mustn`tB.areC.aren`tD.must选择:Youhaveb

选择:You have been doing washing all the morning.You must be tired,( )you?A.mustn`t B.are C.aren`t D.must
选择:You have been doing washing all the morning.You must be tired,( )you?
A.mustn`t B.are C.aren`t D.must

选择:You have been doing washing all the morning.You must be tired,( )you?A.mustn`t B.are C.aren`t D.must
You have been doing washing all the morning.You must be tired,(aren't)you?表示肯定猜测.