" is usually asked by the person inside, as a precaution before opening the door. "
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Anonymous Why would an English speaker say "Who is it?" to somebody say at the door? The person at the door obviously isn't an "it" so why say that? Wouldn't it be better to say how are you?It's an idiom, that is, a group of words that have meaning as a group, but not the same meaning you might think if you analyzed the meaning of each word separatel
AnonymousErrrr. I hate idioms.Join the club! They are a challenge!