为甚麽“This is the key _ the classroom."用"to".要理由要这句话的意思

为甚麽“This is the key _ the classroom.用to.要理由要这句话的意思 This is the key _______(介词)　the door . This is the key of the Kingdom翻译 this is a key of the door修改病句 the key to the door是否可以还原为the key which is to the door Is the key yellow? where is the key genius this is the second time that it has forgotten the key 翻译 This is the key the ___ciassroom.A.to B.of C.at D.in 怎么用英语a,an,the,来填空?有两个题目：1( )orange is on the dask.2This is ( )key.( )key is Gary. 是When the man being killed is the key to this case还是When the man was killed is the key..1.When the man being killed is the key to this case.2.When the man was killed is the key to this case.有什麼分别?文法有错吗? The key is on the table 对The key 提问 This is a key改为一般疑问句? this is his key 改为一般疑问句 This is my key.改为一般疑问句! This is a key.(变为复数) This is his key改一般问句 Is this your key回答怎么说?