—Someone is knocking at the door. —Yes, I’ll go and see who

问题描述:

—Someone is knocking at the door. —Yes, I’ll go and see who it is.
为什么用 it 呢?
1个回答 分类:英语 2014-10-09

问题解答:

我来补答
固定用法,当不知道门外是谁时,就it
 
 
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