Please knock on the door before you go to the office 同义句

Please knock on the door before you go to the office 同义句 同义句转换Please knock at the door before you go into the room 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)) Please knock on the door before _into the Office.进办公室前请敲门 翻译 knock on the door 同义句 you must ____(knock)on the door before you enter always knock on the door before you enter Would you please ____________(not knock)on the door? knock at the door before entering please句中只有KNOCK AT 一个动词?en 英语改错 “Please knock the door before entering.” ______ at the door before you enter my room, please. A．Knock