请问你在中解答的第四个问题的原因是

This is the only key to the room___you can take with you.
A.which B.that C.whereD.what
句子就是说 这把钥匙是这个房间的唯一钥匙 你可以拿上它
后半句 正常语序 就是 you can take 钥匙with you. that指代了钥匙
where 哪儿 用在这里是什么意思呢?谢谢了