问题描述： Whai is Tom doing when his parents come back? 1个回答 分类：英语 2014-09-18 问题解答： 我来补答 当Tom的父母回来的时候,他在做什么? 再问： 回答问题 再答： He is doing his homework. 不过我觉得这个题用过去进行时做更好。 What was Tom doing when his parents came back ? He was doing his homework. 展开全文阅读
