问题描述: just as we were teaving,the postmon(knoked\was knocking)at the door选择括号内的 1个回答 分类:英语 2014-11-23 问题解答: 我来补答 Just as we were leaving,the postman knocked at the door.[正当我们要离开时,邮递员敲门了.]knock是短暂性动词,用一般过去时,而不用过去进行时. 展开全文阅读