Questions 57 to 61 are based on the following passage.
Here amid the steel and concrete canyons, green grass grows. A hawthorn tree(山楂树) stands in new soil, and freshly dug plants bend in the wind.
But Chicago City Hall here seems an unlikely spot for a garden of any variety—especially 20,000 square feet of gardens—on its roof.
As one of a handful of similar projects around the country, the garden is part of a $1.5 million demonstration projected by the city to reduce its "urban heat islands", said William Abolt, the commissioner of the Department of Environment.
Heat islands-dark surfaces in the city, like rooftops-soak up heat. The retention can bake a building, making it stubborn to cooling.
The roof of City Hall, a 90-year-old gray stone landmark on LaSalle Street in the heart of downtown, has been known to reach temperature substantially hotter than the actual temperature on the street below.
The garden will provide greenery and shade. "And that," said the city officials, "will save the city dollars on those blistering summer days." The project savings from cooling is about $4,000 a year on a new roof whose life span is about 50 percent longer than that of a traditional roof.
The sprawling open-air rooftop garden is being carefully built on a multi-tiered bed of special soil, polystyrene, egg-carton-shaped cones and "waterproof membrane" mall to keep the roof from leaking, or caving under the normal combined weight of soil, rain and plant life.
The design calls for soil depths of 4 inches to 18 inches. When the last plants and seedlings are buried and the last bit of compost is laid, the garden will have circular brick stepping-stones winding up to hills.
"The primary focus of what we want to do was to establish this laboratory on the top of City Hall to get people involved and understanding their impact on the environment and how the little things can make an impact on the quality of life", Mr. Abolt said, adding that the plants also help to clear the air.
Rooftop gardens, in places where concrete jungles have erased plants and trees, are not new, not even in Chicago. Arms of greenery dangling over terraces or sprouting from rooftops, common in Europe, are becoming more so in the United States as people become increasingly conscious about the environment.
Richard M. Daley, who urged the environmental department to look into the project after noticing rooftop gardens in Hamburg, Germany a few years ago, has praised the garden as the first of its kind on a public building in the country.
It will hold thousands of plants in more than 150 species-wild onion and butterfly weed, sky-blue aster and buffalo grass-to provide data on what species adapt best. Small plants requiring shallow soil depths were chiefly selected.
57. The rooftop garden project ________.
[A] is common and popular in the country
[B] is a demonstration project and costs the city government 1.5 million dollars
[C] will make the ordinary cooling down of the city in summer unnecessary
[D] aims at getting people involved and understanding their impact on the environment
58. What can we learn about the City Hall?
[A] It was built ninety years ago and is the most outstanding feature in the center of the city.
[B] It is originally proper to build a garden on the top of the City Hall.
[C] The temperature on its top is a little bit lower than that on the street below.
[D] It is the first building in America to have a garden on it.
59. Which of the following statements is TRUE?
[A] Every year, Chicago spends about $ 4,000 on cooling the city.
[B] The design of the garden on the City Hall specially takes into consideration the weight the roof can stand.
[C] The Mayor urged the environmental department to look into rooftop gardens in Hamburg and build similar ones in America.
[D] Heat islands mainly refer to those dark-colored rooftops which receive and retain heat and will not easily release the heat.
60. Why should the rooftop garden be built on the top of City Hall other than on any other buildings?
[A] Because the City Hall is large.
[B] Because the mayor had urged the environmental department to do so.
[C] Because it can make people understand their impact on environment better through a public building.
[D] Because the experts just want to make the City Hall a convenient laboratory.
61. The word "substantially" (Line 2, Para. 5) most likely means ________.
[A] a little bit [B] in fact [C] materially [D] considerably
参考答案见下页
57. D 细节题。文章第三段第一句指出，该工程是全国为数不多的此类工程之一，所以排除A;还说它是政府投资l50万美元的示范工程的一部分，而不是全部，故排除B;文章第四段提到屋顶花园可以降温，但并没有否定传统降温方式的必要性，故排除C;由文章第九段阿伯特先生所说的话可知，D正确。
58. A 细节题。由文章第五段可知，市政厅的屋顶有90年的历史，即市政厅建于90年前，且是市中心最著名的建筑，所以A正确。第二段第一句中的an unlikely spot否定了B项中的originally proper。根据第五段可排除C，根据第十段not new可排除D。
59. B 推断题。由文章第七段可知，市政厅屋顶花园是精心建造而成的，可以避免屋顶渗漏，或是在土、雨和植物相混合的重量之下坍塌，由此可知，屋顶花园的设计充分考虑到了屋顶能承受的重量，所以B正确。
60. C 细节题。由文章第九段可知，在市政厅大楼上修建屋顶花园主要是为了让人们了解自己对环境的影响，所以C正确。虽然该段也提到了laboratory，但指的是让人们了解自己对环境的影响的“实验室”，而并不是真正做实验的实验室，故排除D。
61. D 语义题。被考查词在句中用于修饰比较级hotter，分析句意可知，此处应表示强调，突出屋顶的温度要比街上的温度高出很多，选项中只有D(相当大地)最符合。A(一点)，B(实际上)，C(本质上地)均应排除。
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