We _____ [have] our breakfast when suddenly an old man came to the door 这空因添什么 请说明原因谢谢

问题描述:

We _____ [have] our breakfast when suddenly an old man came to the door 这空因添什么 请说明原因谢谢

were having
当我们在吃早饭的时候,突然一位老人来到门前.
他来时我们正在吃,所以用过去进行时