问题描述： are,the ,the pens,teacher's (连词成句） 1个回答 分类：英语 2014-12-09 问题解答： 我来补答 the pens are the teacher's.欢迎追问 再问： Their keys are on the sofa.(变为一般疑问句，并作肯定回答） 再答： are their keys on the sofa？ yes，their keys are on the sofa. 展开全文阅读
