问题描述: My mother is busy ______ the room.A.clean B.to clean C.cleaning D.cleans 1个回答 分类:英语 2014-11-23 问题解答: 我来补答 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 展开全文阅读