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                           general:: 
                            Phrase(s): Who is this? 
Who is making this telephone call?; Who is on the other end of this telephone line?  •  Tom (answering the phone): Hello? Fred: Hello. Do you have any fresh turkeys? Tom: Who is this? Fred: Isn’t this the Harrison Poultry Shop? Tom: No. Fred: I guess I have the wrong number.  •  Mary (answering the phone): Hello? Sue: Hello, who is this? Mary: Well, who did you want? Sue: I want Grandma. Mary: I’m sorry, I think you have the wrong number.
                        
                        
 
                        
                            McGrawhill's American Idioms And Phrasal Verbs