问题描述： Look!My sister is singing song.改一般疑问句并作肯定和否定回答 1个回答 分类：英语 2014-11-30 问题解答： 我来补答 Look!My sister is singing songs.改一般疑问句：Is your sister singing songs?作肯定和否定回答:Yes,she is .\ No,she isn't. 展开全文阅读
