问题描述： This apple is sweet.改成否定句,意思不变 1个回答 分类：综合 2014-12-03 问题解答： 我来补答 This apple isn't bitter.Who has never tasted bitter,knows not what is sweet.[谚]不尝黄连苦,怎知蜂蜜甜. 展开全文阅读
