英语单选语法问题——There's somebody at the door,Mr.Corleone——Tell ( )

英语单选语法问题——There's somebody at the door,Mr.Corleone——Tell ( ) There’s somebody()behind the door. —Oh,there's someone knocking at the door.—______ must be tha 1.— There’s someone knocking at the door.Who could _____ be? 单选oh,there's someone knocking at the door-must be your neigh ——You can see Mr.Lee if there is a sign "( )"on the door of Tell Mary that there's someone _______for her at the door. Tell Mary that there's someone _____for her at the door. there`s sound at the door.翻译 Somebody knocked at the door while I___ —There is a knock at the door.—---------------?A.who is that —There is somebady at the door.Who _____ it be?