The first underground in the world
During the first half of the 19th century, people in London were conveyed to and around the city centre by horsedrawn buses, trams, cabs and carriages. But the vehicles resulted in traffic jams,
In 1854, the government
During World War Ⅱ， the underground system had some
And the last line
2 . Below are the four most famous bridges in the world.
Ponte Vecchio Bridge
The Ponte Vecchio (literally “old bridge”) is a bridge built in the Middle Ages over the Arno River in Florence, Italy, the only Florentine bridge to survive World War Ⅱ. The bridge is unique for still having shops built along it, as was common in the days of the Medici. Butchers originally occupied souvenir sellers. It is said that the economic concept of bankruptcy originated here: when a merchant could not pay his debts, the table on which he sold his goods was physically broken by soldiers, and this practice was called “bancorotto (broken table)”．
Golden Gate Bridge
The Golden Gate Bridge is a suspension bridge spanning the Golden Gate, the strait between San Francisco and Marin County to the north. It is the masterwork of architect Joseph B. Strauss, whose statue graces the southern observation deck. The bridge took seven years to build, and was completed in 1937. The Golden Gate Bridge used to be the longest suspension bridge span in the world. And today it has become one of the most popular tourist attractions in San Francisco and California. Since its completion, the span length has been surpassed by eight other bridges. The famous red-orange color of the bridge was specifically chosen to make the bridge more easily visible through the thick fog that frequently covers the bridge.
Millau Bridge
Started in 1998 and opened to traffic in 2005, the Millau Viaduct is a huge cable-stayed road-bridge that spans the valley of the river Tarn near Millau in southern France. It is the tallest highway bridge in the world, with the highest pylon’s summit at 343 meters—slightly taller than the Eiffel Tower. The speed limit on the bridge was reduced from 130 km/h to 110 km/h because of traffic slowing down, due to tourists taking pictures of the bridge from the vehicles. Shortly after the bridge opened to traffic, passengers were stopping to admire the landscape and the bridge itself.
Charles Bridge
The Charles Bridge is a famous stone Gothic bridge that crosses the Vltava River in Prague, Czech Republic. Its construction started in 1357 under the support of King Charles IV, and finished in the beginning of the 15th century. As the only means of crossing the river Vltava, the Charles Bridge was the most important connection between the Old Town and the area around Prague Castle. Connection made Prague important as a trade route between Eastern and Western Europe. Today it is one of the most visited sights in Prague with painters, owners of kiosks and other traders alongside numerous tourists crossing the bridge.
1. Of the four bridges, which one has the shortest history?| A．Ponte Vecchio. | B．Golden Gate Bridge. |
| C．Millau Bridge. | D．Charles Bridge. |
| A．The span length ranks the 8th in the world. |
| B．Its color enables travelers to see it easily on foggy days. |
| C．It is the most popular tourist attraction in America. |
| D．It took Joseph B. Strauss 7 years to design the bridge. |
| A．it attracted many famous painters there |
| B．it was supported by King Charles IV |
| C．it was the only stone Gothic bridge crossing the Vltava River |
| D．it promoted the trade between Eastern and Western Europe |
