阅读理解

阅读下面短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。

　　In the late 1960's many people in North America turned their attention to environmental problems and new steel-and-glass skyscrapers were widely criticized. Ecologists pointed out that a cluster of tall buildings in a city often overburdens public transportation and parking lot capacities(汽车停车空间).

　　Skyscrapers are also lavish(奢侈的) consumers and wasters of electric power. In one recent year the addition of 17 million square feet of skyscraper of fice space in New York City raised the peak daily demand for electricity by 120 000 Kilowatts-enough to supply the entire city of Albany New York for a day.

　　Glass-walled skyscrapers can be especially wasteful. The heat loss(or gain) through a wall of half-inch plate glass is more than ten times that through a typical masonry wall filled with insulation board(隔热板). To lessen the strain on heating and air-conditioning equipment builders of skyscrapers have begun to use double-gazed panels of glass reflective glasses coated with silver or gold mirror films that reduce glare as well as heat gain. However mirror-walled skyscrapers raise the temperature of the surrounding air and affect neighboring buildings.

　　Skyscrapers put a severe strain on a city's sanitation facilities(卫生设施) too. If fully occupied the two World Trade Center towers in New York City would alone generate 2 . 25 million gallons of raw sewage(污水) each year as much as a city the size of Stamford Connecticut which has a population of more than 109 000.

　　Skyscrapers also interfere with television reception block bird flyways and obstruct air traffic. In Boston in the late 1960's some people even feared that shadows from skyscrapers would kill the grass on Boston Common.

　　Still people continue to build skyscrapers fox all the reasons that they have always build them personal ambition civic pride and the desire of owners to have the largest possible amount of rentable space.

1．According to the passage what is one disadvantage of skyscrapers that have glass walls?

[　　]

A．The surrounding air is heated.

B．The glass is easily broken.

C．Construction cost is increased.

D．Extra air-conditioning equipment is needed.

2．According to the passage in the late 1960's some residents of Boston were concerned with which aspect of skyscrapers?

[　　]

A．The noise and dirt from their construction.

B．The harmful effects on the city's grass.

C．The obstruction of air traffic in Boston.

D．The interference with television reception.

3．The author raises issues that would most concern which of the following groups?

[　　]

4．What may be the most probable reason for the erecting of two world Trade Center towers?

[　　]

A．Personal ambition.

B．Civic pride.

C．Desire of owners to have the largest possible a-mount of rent able space.

D．To animal attention.

5．The main purpose of the passage is to ________.

[　　]

A．describe skyscrapers and their effect on the environment

B．prove skyscrapers are superior to other modern structures.

C．advocate the use of double-glazed panels of glass

D．illustrate many architectural materials and designs of skyscrapers