问题描述: What grade are you in?I'm in first grade,first前为什么不加the呢? 1个回答 分类:英语 2014-11-30 问题解答: 我来补答 把下面两个句子合并成一个句子:What grade are you in ,kathy?I'm inAre you in shird grade?I'm in the third grade,and you? 展开全文阅读