问题描述： a car accident happened on my way home yesterday 改为同义句 1个回答 分类：英语 2014-10-01 问题解答： 我来补答 =A car accident took place on my way home yesterday happen = take place 发生 再问： when the ufo arrived,i______ 1.am walking 2.was walking 3.walked 4.walking 再答： 选 was walking 用过去进行时与前面的过去式 arrived 对应、 展开全文阅读
