请用适当的be动词填空Sally____cleaning the window.Father and I____walking along the river.The boys ____playing football.I____swimming in the river.

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请用适当的be动词填空Sally____cleaningthewindow.FatherandI____walkingalongtheriver.Theboys____playingfootball.

请用适当的be动词填空Sally____cleaning the window.Father and I____walking along the river.The boys ____playing football.I____swimming in the river.
请用适当的be动词填空
Sally____cleaning the window.
Father and I____walking along the river.
The boys ____playing football.
I____swimming in the river.

请用适当的be动词填空Sally____cleaning the window.Father and I____walking along the river.The boys ____playing football.I____swimming in the river.
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