listen! someone is knocking _ the window填什么

listen! someone is knocking _ the window填什么 --Listen! Someone is knocking at the door. 单句改错：listen!someone is knocking the door --Listen! Someone is knocking at the door. Who _____it be? Listen! Someone is knocking _________ the door. [   ---Listen! Someone is knocking at the door. Who _____it be? listen!someone is knocking at the door.------ must be my cou Listen!Someone is knocking__the window.这句话是填at还是on那?两者有什么区别? Listen!I hear someone knocking at the door. Listen!Who is knocking at the door? 1.---Listen!Sometime is knocking the door. Listen,l hear someone knocking at the door的同义句 Listen!There