Please knock on the door ( )you came into the room A after B

Please knock on the door ( )you came into the room A after B There came a knock on the door 同义句转换Please knock at the door before you go into the room Mr wang came into the office without __the door A knock B kn ______ at the door before you enter my room, please. A．Knock Would you please ____________(not knock)on the door? ——at the door before you enter my room A knock B knocking Ck 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)) there was a knock on the door. Please knock on the door before you go to the office 同义句 Please ___ the door when you leave the room. A close B pick