skyscrapers Modern skyscrapers have a steel skeleton of beam...

选D
翻译：摩天大楼有樱庆横梁和柱子的钢骨架，这形成了一个三维网格。
A 用forms 说明后面跟的是从句，但从句少主语
B 要用from which forms，形成定语从句
C 去掉and 就对了，forming....现在分词短语宏颂碧作后置定语。蔽举

Skyscrapers and Environment
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.
skyscrapers are also lavish consumers, and wasters, of electric power. in one recent year, the addition of 17 million square feet of skyscraper office 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. to lessen the strain on heating and air-conditioning equipment, builders of skyscrapers have begun to use double-glazed panels of glass, and 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, too. if fully occupied, the two world trade center towers in new york city would alone generate 2.25 million gallons of raw sewage each year-as much as a city the size of stanford, connecticut , which has a population of more than 109, 000.

skyscrapers是摩天大楼的复数形式。

一、短语

1、steel-and-glasssky scrapers 玻璃幕墙摩天大楼

2、Skyscrapers and the environment 摩天大楼于环境

二、参考例句

1、How can you pretend you're at the beach if all you see are cars, busses and skyscrapers?
如果放眼所及都是汽车、公车和摩天大楼，你怎么可能假装自己身在沙滩？

2、All of the skyscrapers will have farms, create their own energy and deal with their own waste.
所有的摩天大楼都有农场，用来生产他们凯清自己的所需含友的能源和处理废物。

3、In Mainland China, new skyscrapers have kept springing up because of the unparalleled economic boom.
在中国大陆，因空前的谈孙槐经济繁荣，新摩天大楼如雨后春笋般落成。