Please knock at the door___ you come into

几道简单的英语改句子please knock at the door before you come into the Please ____(knock)at the door when you come in. 同义句转换Please knock at the door before you go into the room Please knock on the door ( )you came into the room A after B please knock at the door before you enter the room（同义句转换） Please knock at the door before you enter the room .(同义句转化)) knock on knock into knock at knock up We make it a rule to knock at the door before you come in.I ______ at the door before you enter my room, please. A．Knock knock into sb和knock at knock at the door before entering please句中只有KNOCK AT 一个动词?en Would you please [ ]before you come into the room?A.take you