The dog can,t( )on the see-saw.A.play B.is playing C.playing

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Thedogcan,t()onthesee-saw.A.playB.isplayingC.playingThedogcan,t()onthesee-saw.A.playB.isplayingC.pla

The dog can,t( )on the see-saw.A.play B.is playing C.playing
The dog can,t( )on the see-saw.A.play B.is playing C.playing

The dog can,t( )on the see-saw.A.play B.is playing C.playing
A
情态动词can后面加动词原形