Tom,____(knock)on the door before you come in next time

Tom,____(knock)on the door before you come in next time knock on;knock at;knock over;knock knock on you must ____(knock)on the door before you enter knock on knock into knock at knock up His birthday is on October 15th.同义句 He ____ ____ on October 15th. Tom was born on June 5th 改为同义句 knock on的音标 Knock on wood. 翻译 KNOCK ON -____ ____ christmas?-on the 25th of December. knock on与knock at的区别 ____ I was falling asleep,there was a loud knock on the door.(when/while) Tom is sitting on the desk.改为祈使句.____ ____ on the desk ,Tom.哥哥姐姐 Joan was born on 12th May. 12th May提问 ____ ____Joan_______?怎么做急 Listen,l hear someone knocking at the door的同义句Listen,____ _____ a knock on the door Knock on 和Knock at 有什么区别啊? knock at和knock on有区别吗?