Much of the space inside （and there is not so much space） has be

Much of the space inside （and there is not so much space） has been sacrificed to airy halls and lobbies and to the elegant structure of staircases.
【正确答案】：（房子）内部的大部分空间（这个空间也没有多大）都已贡献给了通风的厅堂和优雅的楼梯架构。