at the door和by the door有什么区别

at the door和by the door有什么区别 请问stand at the door 和stand by the chalkboard,为什么用at和by呢?两者有什么区别? at the front door和at front door的区别 in the door和at the door 的区别 at the door和on the door的区别? please tell me if he knocks()the door.A.at B.in C.with D.by they were i______ by a knock at the door The door was closed by me 和The door was closed 的区别 Wolf At The Door 歌词 knock at the door造句 Wendys at the classroom door . no cover at the door at the door 的意思 at the dear's door knock at the door 和 knock on the door有什么区别吗详解,谢 knock at the door和knock on the door到底有什么区别? in the door和at the door的区别如题 knot on the door和knot at the door的区别