问题描述： 是what did they use to have?还是what did they use to do? 1个回答 分类：英语 2014-12-08 问题解答： 我来补答 What did they use to have?他们过去有什么?（表示现在没了）What did they use to do?他们过去做什么?（表示现在不做了） 展开全文阅读
