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My mother is busy ______ the room. A.clean B.to clean C.cleaning D.cleans
3个回答
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My mother is busy (cleaning )the room
我妈妈正忙于打扫房间
cleaning the room打扫房间;正在打扫房间;正在清扫房间
我妈妈正忙于打扫房间
cleaning the room打扫房间;正在打扫房间;正在清扫房间
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