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Each time a city building is set up, the grass in that spot and trees that once reached up to the sky are replaced by a tar (柏油) roof. In addition to that, roads, parking lots, and yet more buildings are being constructed. The total lost green space can have a very real effect on a city’s air temperature, air quality and energy costs. On a summer day in most American cities, a tar roof can feel like the inside of an oven. But what if we could replace the hot roof of each skyscraper or building in a city with grass or a garden?

    Whether it holds vegetable gardens, wildflowers, or meadow grasses, a green roof can lower the temperature above a building by 60 degrees, which can reduce the building’s energy costs. If used more widely, green roofs could decrease a city’s total energy costs, reduce polluted air from power plant , and improve air quality and public health. But that’s not all — green roofs are a great way to deal with water management in urban areas with overwhelmed sewerage (排污) systems, and actually extend the life time of the roof itself. And green roofs do something else: They beautify the city — whether you’re on the 3rd floor or the 30th. Now that’s a great achievement.

    The environmental nonprofit group Earth Pledge is promoting a Green Roofs progamme. To learn more about how to create a green roof — and the benefits it will provide — visit its website at EarthPledge.com.

This passage is most likely to appear in “______” in a webpage.

A. City Environment       B. True Stories         C. Home and Garden   D. Family Health

The construction of more city buildings leads to ______.

A. fewer energy costs  B. increase of gardens C. poor quality of air  D. loss of parking space    

What en tar roofs are replaced with green ones, ______.

A. low temperature improves one’s health   B. everyone tends to plant vegetables in roof gardens

C. people need more sewerage systems      D. the greenness adds to the beauty of city environment

You can visit EarthPledge.com with the purpose of ______.

A. building a home garden                        B. offering money to the group

C. understanding green roofs better                 D. creating a website of Green Roofs

Each time a city building is set up, the grass in that spot and trees that once reached up to the sky are replaced by a tar (柏油) roof. In addition to that, roads, parking lots, and yet more buildings are being constructed. The total lost green space can have a very real effect on a city’s air temperature, air quality and energy costs. On a summer day in most American cities, a tar roof can feel like the inside of an oven. But what if we could replace the hot roof of each skyscraper or building in a city with grass or a garden?

    Whether it holds vegetable gardens, wildflowers, or meadow grasses, a green roof can lower the temperature above a building by 60 degrees, which can reduce the building’s energy costs. If used more widely, green roofs could decrease a city’s total energy costs, reduce polluted air from power plant , and improve air quality and public health. But that’s not all — green roofs are a great way to deal with water management in urban areas with overwhelmed sewerage (排污) systems, and actually extend the life time of the roof itself. And green roofs do something else: They beautify the city — whether you’re on the 3rd floor or the 30th. Now that’s a great achievement.

    The environmental nonprofit group Earth Pledge is promoting a Green Roofs progamme. To learn more about how to create a green roof — and the benefits it will provide — visit its website at EarthPledge.com.

1.This passage is most likely to appear in “______” in a webpage.

A. City Environment    B. True Stories       C. Home and Garden      D. Family Health

2.The construction of more city buildings leads to ______.

A. fewer energy costs  B. increase of gardens C. poor quality of air  D. loss of parking space 

3.What en tar roofs are replaced with green ones, ______.

A. low temperature improves one’s health    B. everyone tends to plant vegetables in roof gardens

C. people need more sewerage systems     D. the greenness adds to the beauty of city environment

4.You can visit EarthPledge.com with the purpose of ______.

A. building a home garden                        B. offering money to the group

C. understanding green roofs better              D. creating a website of Green Roofs

Each time a city building is set up, the grass in that spot and trees that once reached up to the sky are replaced by a tar(柏油) roof. In addition to that, roads, parking lots, and yet more buildings are being constructed. The total lost green space can have a very real effect on a city’s air temperature, air quality and energy costs. On a summer day in most American cities, a tar roof can feel like the inside of an oven (烤箱). But what if we could replace the hot roof of each skyscraper or building in a city with grass or a garden?
    Whether it holds vegetable gardens, wildflowers, or meadow grasses, a green roof can lower the temperature above a building by 60 degrees, which can reduce the building’s energy costs. If used more widely, green roofs could decrease a city’s total energy costs, reduce power plant emissions (排放), and improve air quality and public health. But that’s not all ― green roofs are a great way to deal with water management in urban areas with overwhelmed sewerage（排污）systems, and actually extend the life span (壽命) of the roof itself. And green roofs do something else: They beautify the city ― whether you’re on the 3rd floor or the 30th. Now that’s a great achievement.
    The environmental nonprofit group Earth Pledge is promoting a Green Roofs initiative (積極性). To learn more about how to create a green roof ― and the benefits it will provide ― visit its website at EarthPledge.com.

49. This passage is most likely to appear in “______” in a webpage.

A. City Environment    B. True Stories            C. Home and Garden     D. Family Health

50. The construction of more city buildings leads to ______.

A. loss of parking space  B. increase of gardens  C. poor quality of air     D. fewer energy costs

51. When tar roofs are replaced with green ones, ______.

A. everyone tends to plant vegetables in roof gardens

B. people need more and more sewerage systems

C. low temperature improves people’s health

D. the greenness adds to the beauty of the city environment

52. You visit EarthPledge.com with the purpose of ______.

A. building a home garden                               B. offering money to the group

C. understanding green roofs better                 D. creating a website of Green Roofs

 Each time a city building is set up, the grass in that spot and trees that once reached up to the sky are replaced by a tar (柏油) roof. In addition to that, roads, parking lots, and yet more buildings are being constructed. The total lost green space can have a very real effect on a city’s air temperature, air quality and energy costs. On a summer day in most American cities, a tar roof can feel like the inside of an oven. But what if we could replace the hot roof of each skyscraper or building in a city with grass or a garden?
    Whether it holds vegetable gardens, wildflowers, or meadow grasses, a green roof can lower the temperature above a building by 60 degrees, which can reduce the building’s energy costs. If used more widely, green roofs could decrease a city’s total energy costs, reduce polluted air from power plant , and improve air quality and public health. But that’s not all — green roofs are a great way to deal with water management in urban areas with overwhelmed sewerage (排污) systems, and actually extend the life time of the roof itself. And green roofs do something else: They beautify the city — whether you’re on the 3rd floor or the 30th. Now that’s a great achievement.
    The environmental nonprofit group Earth Pledge is promoting a Green Roofs progamme. To learn more about how to create a green roof — and the benefits it will provide — visit its website at EarthPledge.com.

54. This passage is most likely to appear in “______” in a webpage.

A. City Environment       B. True Stories         C. Home and Garden   D. Family Health

55. The construction of more city buildings leads to ______.

A. fewer energy costs  B. increase of gardens C. poor quality of air  D. loss of parking space    

56. What en tar roofs are replaced with green ones, ______.

A. low temperature improves one’s health   B. everyone tends to plant vegetables in roof gardens

C. people need more sewerage systems      D. the greenness adds to the beauty of city environment

57. You can visit EarthPledge.com with the purpose of ______.

A. building a home garden                        B. offering money to the group

C. understanding green roofs better                 D. creating a website of Green Roofs