老外问你是谁是不是说who is it?而不是who are you?

问题描述:

老外问你是谁是不是说who is it?而不是who are you?

当面问你:who are you?
电话里:who is it.
有人敲门:who is it.
可以总结:当你看不到这个人的时候,一般用it来代替.