the key is used by people for opening the door 】

the key is used by people for opening the door 】 Keys are used by people （for/with/to opening) the door. The key ____ for opening the door of the room. Lily is opening the door.(对opening the door提问) Is it the key to the door of for classroom the key is already being used by another computer the key to the door is missing is there a key to the door This is the key __the door. The key( ) she was opening the door broke.【填入引导词】说明原因, He__someone opening the door.(hear) Tom opening is door the politely（连句子）