问题描述： it's a new book 改为否定的复数形式 1个回答 分类：英语 2014-12-13 问题解答： 我来补答 They aren't new books. 再问： this is her bike 改为一般疑问句并作否定句 再答： Is this her bike? No, it isn't.再问： those are my parents 改为一般疑问句并作肯定回答 展开全文阅读
