（） that at the door ---It's my cousin Judy.A Who's B What's

Who's that at the door?____ is the postman.A.She B.This C.It .______is that?That’s my cousin.A.Who B.What C.Whose 怎样选择 Who's that at the door --who's that at the door?--____ is a postman. 语法,( ) 1 Who's that at the door?____ is the postman.A.She B. 英语单项选择,Who's that at the door?____is the postman.A.She B.He -Mary,the door bell is ringing.Who's that?-Oh,it's my friend someone is knocking at the door （）i go and see who it is A s Who is she?She's my teacher What's that?It's a renily--box改为 （ ）Jim,who's at the door?Dad,I think______.A.he is LiLei B.h who was in the classroom at that time?A.Yes,it's Jack B.None --Who's knocking at the door?