问题描述: Do you think it necessary to learn to wait in line 我总是觉得it 要变成it is 1个回答 分类:英语 2014-12-02 问题解答: 我来补答 变也可以,但句子结构也变了,一般情况都是用第一句.Do you think it necessary to learn to wait in line .简单句Do you think it is necessary to learn to wait in line 宾语从句 展开全文阅读