My home is on the third floor.对on the third 提问
问题描述：
My home is on the third floor.对on the third 提问
答
Which floor is your home?
因为on the third是序数词，得用which提问，表示第几层。
祝你学习进步！又不懂得可以再问我
答
which floor is your home?
答
Which floor is your home?
因为是对on the third提问,而不是对on the third floor,所以问句中可以保留floor,且应该是“哪一层楼”（which floor）.
答
Where is your home?