[不定项选择题]共用题干 Giant Structures
It is an impossible task to select the most amazing wonders of the modern world since every year more______(1)constructions appear. Here are three giant structures which are worthy of our admiration______(2)they may have been surpassed by some more recent wonders.
The Petronas Twin Towers
The Petronas Towers were the tallest buildings in the world when they were completed in 1999.______(3)a height of 452 metres,the tall twin towers,like two thin pencils,dominate the city of Kuala Lumpur. At the 41st floor,the towers are______(4)by a bridge,symbolizing a gateway to the city. The American architect Cesar Pelli designed the skyscrapers.
Constructed of high-strength concrete,the building______(5)around 1,800 square metres of office space on every floor. And it has a shopping centre and a concert hall at the base.Other______(6)of this impressive building include double-decker lifts,and glass and steel sunshades.
The Millau Bridge
The Millau Bridge was opened in 2004 in the Tarn Valley,in southern France. At the ______(7)it was built,it was the world,5 highest bridge,______(8)over 340m at the highest point. The bridge is described as one of the most amazingly beautiful bridges in the world. It was built to ________ (9) Millau's congestion（拥堵）problems. The congestion was then caused by traffic passing from Paris to Barcelona in Spain. The bridge was built to with-stand the______(10) extreme seismic（地震的）and climatic conditions. Besides , it is guar- anteed for 120 years!
The Itaipu Dam
The Itaipu hydroelectric power plant is one of the largest constructions of its kind in the world.
It______(11)of a series of dams across the River Parana,______(12)forms a natural border between Brazil and Paraguay. Started in 1975 and taking 16 years to complete, the construction was carried out as a joint project between the two______(13).The dam is well-known for both its electricity output and its size. In 1995 it produced 78% of Paraguay's and 25% Of Brazil's______(14)needs. In its construction,the amount of iron and steel used was equivalent to over 300 Eiffel Towers.It is a______(15)amazing wonder of engineering. 12._________
A.what
B.who
C.that
D.which