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31．--Where is Tom?--Look．He in the pool with the boys．A．is swim B．is swimming C．is swiming D．swims 【查看更多】

 

題目列表(包括答案和解析)

--Where is Tom?

--Look．He _________ in the pool with the boys．

A．is swim           B．is swimming          C．is swiming           D．swims

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