问题描述： he has to (help his sister study english)?对大括号的提问 1个回答 分类：英语 2014-12-07 问题解答： 我来补答 我不知道你什麽意思.是指转换成疑问句么?What does he have to do?He has to help his sister study English. 展开全文阅读
