The door opened ______ (by itself / of itself). 究竟哪个正确?of itself 自动的,by itself 独自、单独；for itself 亲自,为自己以上为找到的参考资料,网络上存在两种答案,究竟是哪个呢?请专家详解,谢谢!

He ____(slow) opened the door and went away. S(),the door opened He opened the door wide. ___at the door ,i'v hardly rung the bell ____ the door opened.为什么用standing ,before? the door is ____.A,opens B,opened C,close D,closedthank you very much He opened the door.变被动语态 Who opened the door?改为被动语态. The door opened.改为否定句 He has opened the door.和He opened the door.有什么区别? I don't think you should sleep with the door ____ A open B opened 为什么选A he uesd to sleep with the door ____ A.on b.opened c.closed d.close要说为什么. the door opened为什么不用被动语态?the door opened等于the door is open么?翻译起来一样么？ The door of the shop is ____(close/closed) now.It will ____(open/opened) tomorrow.为什么第一个填closed 第二个填open. 【the door opened and in he came the door opened and in he came 不应该为 the door opened and in came he 对把 倒装句子The door opened,in came a girl.句子 The door opened,in came a girl.为什么不是 The door opened ,came in a girl.?怎么理解? He opened the door to the balcony是什么意思 He opened the door and went t_____ to the hall. The boy ______(run) to the door and opened it.