第6部分：完形填空(第51～65題，每題1分，共15分)下面的短文有15處空白，請根據短文內容為每處空白確定1個最佳選項。

Giant Structures

It is an impossible task to select the most amazing wonders of the modern world since every year more___51__constructions appear. Here are three giant structures which are worthy of our ___52__although 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. With a___53__of 452 metres, the tall twin towers, like two thin pencils, dominate the city of Kuala Lumpur. At the 41st floor, the towers are linked by a bridge, symbolizing a gateway to the city. The American___54__Cesar Pelli designed the skyscrapers.Constructed of high-strength concrete, the building provides around l, 800 square metres of office space___55__every floor. And it has a shopping centre and a concert hall at the base. Other __56__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. ___57__the time it was built, it was the world's highest bridge, ___58__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 ___59__Millau's congestion problems. The congestion was then caused by traffic passing from Paris to Barcelona in Spain. The bridge was built to withstand the___60__extreme seismic and climatic conditions. Besides, it is guaranteed for 120 years!

The Itaipu Dam The Itaipu hydroelectric power plant is one of the largest constructions of its kind in the world. It consists of a series of dams across the River Parana, ___61__forms a natural border betweenBrazil6 and Paraguay. Started in 1975 and taking 16 years to complete, the construction was carried out as a joint project between the two___62__. The dam is well-known for both its electricity output and its size. In 1995 it produced 78% 0f Paraguay's and 25% 0f Brazil's___63__ needs. In its construction, the___64__of iron and steel used was equivalent to over 300 Eiffel Towers. It is a___65__amazing wonder of engineering.

51. A. wonderful B. delightful C. helpful D. careful

52. A. when B. although C. if D. because

53. A. In B. With C. Above D. On

54. A. designed B. located C. built D. linked

55. A. costs B. sits C. stands D. provides

56. A. features B. types C. tasks D. roles

57. A. place B. map C. time D. view

58. A. developing B. reaching C. expanding D. lasting

59. A. restrict B. replace C. relieve D. relax

60. A. much B. more C. less D. most

61. A. consists B. makes C. sets D. uses

62. A. what B. who C. that D. which

63. A. countries B. provinces C. members D. regions

64. A. water B. energy C. oil D. food

65. A. mainly B. hardly C. rarely D. truly

參考答案：ABBDD ACBCB ADABD

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