jusy as we were leaving ,the postman (knocked/was knocking) at the door
题目
jusy as we were leaving ,the postman (knocked/was knocking) at the door
答案
knocked
knocked （敲门）是瞬间动词,在英语中,瞬间动词用一般过去时.持续动词用过去进行时
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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