问题描述: 用括号内动词的适当形式填空,一些句子要用否定形式 1个回答 分类: 英语 2014-11-25 问题解答: 我来补答 don't speak 再答: is waiting 再答: improves 再答: is looking 再答: stays再问: 再答: isn't doing 展开全文阅读