小题1:B
小题2:D
小题3:C
小题4:A
文章介绍了世界上几大地铁的具体情况。
小题1:细节题根据第2部分2,3行The best of them were built during the Stalinist era and feature chandeliers(枝形吊灯), marble moldings and elaborate murals(精美的壁画).可知B正确。
小题2:推理题。根据第三部分2,3行one of the few subway systems in the world that actually turns a profit.可知是为了获得利润D正确。
小题3:细节题。根据第4部分第4行By that .point, it would be three times larger than Chicago “L”.可知C正确。
小题4:细节题。根据第三部分第2行It’s privately owned可知A正确。