What is the oldest subway system in the world?

London’s Underground, which opened in 1863, is the oldest subway system in the world. Despite the name, about 55% of the subway network is above ground. (MANY) than one billion passenger journeys were recorded in 2007. The (BUSY) station in the London Underground network is Victoria station, which serves about 78 million passengers a year. The tube map, with its schematic and colour-coded layout, (CONSIDER) a design classic.

Why do the Chinese call the Yellow River in China “China’s Sorrow”?

The Huang He, or Yellow River, in China is called “China’s Sorrow” by the Chinese themselves. Since long ago, flooding (BE) a serious problem.
The (BAD), most sorrowful flood on record happened in 1931. The waters began to rise in July, and by November of that year, more than 40,000 square miles had been flooded, (LEAVE) 80 million people homeless.