There is somebody knoking at the door.Go to see________.为什么填

There is somebody knoking at the door.Go to see________.为什么填 There is somebody knocking at the door .Go to see( ) it is. There is somebody at the door .I go and see who it is . have you heard someone knock at the door?为什么是knock,不是knoking there is ( ）knocking at the door.GO and see who it is A nobo There is a boy ( )at the door. Somebody knocked at the door while I___ There’s somebody()behind the door. 一道英语填词题There is someone knocking at the door.Please go and s There is a man ___ the door.空白应填at还是near There is somebody here.Somebody wants to go shopping with yo is there a key to the door