“who is it”造句，怎么用who is it造句

Answer the phone, somebody please, pick the phone. Hello, hello, hello, who is it?

We know it's not petunia... so, who is it?

And who is it that deceives the state? Surely the man who speaks not what he thinks.

He picks up the telephone, says, Hello, who is it?

A: Never mind. So who is it?