问题描述: It's a long time since they left.的同义句 1个回答 分类:英语 2014-09-22 问题解答: 我来补答 It's a long time since they left.= They have been away for a long time.= They have been away since a long time ago.= A long time has passed since they left.= They left a long time ago. 展开全文阅读