This is a key to my door.(翻译)

This is a key to my door.(翻译) This is my key.改为一般疑问句! It is a key.( )this is my pen.( )black.括号里填什么啊It is a key.( )this is my pen.( )black.括号里填什么啊 Do you have a key, that is the key to unlock my heart.是什么意思? to的用法~如：This is the key to my bike . Is that your key? _____ .This is my key . A. No B .Yes C. OK D .Excuse me This is a key改为一般疑问句? This is a key.(变为复数) this gate requires a key to This is a white key 的提问This is a white key ,对“a white key 进行提问 This is the key ____the classroom.A.to B of C at D in This is the key __the door.A of B with C to D in This is the key the ___ciassroom.A.to B.of C.at D.in This is my blue pen.(改为一般疑问句）()this () blue pen?This is a white key.(对划线部分提问)()()this? This morning I went to work in such a hurry that I __ the key to my office at home. This is a key to opening this door这句话有问题吗?This is a key to opening this door.还是This is a key to open this door.是哪个对?这里的to是当作介词还是不定式? it is my key is there a key to the door