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The persistent haze over many of our cities is a reminder of the polluted air
The persistent haze over many of our cities is a reminder of the polluted air
游客
2024-03-11
25
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问题
The persistent haze over many of our cities is a reminder of the polluted air that we breathe. Over 80% of the world’s urban population is breathing air that fails to meet World Health Organisation guidelines, and an estimated 4.5 million people died【C1】______from outdoor air pollution in 2015.
Globally, urban populations are expected to double in the next 40 years, and an extra 2 billion people will need new places to live, as well as services and ways to move around their cities. What is more important, the decisions that we make now about the design of our cities will【C2】______the everyday lives and health of the coming generations. So what would a smog-free, or at least low-pollution, city be like?
Traffic has become【C3】______with air pollution, and many countries intend to ban the sale of new petrol and diesel cars in the next two decades. But simply【C4】______to electric cars will not mean pollution-free cities. The level of emissions they cause will depend on how the electricity to run them is【C5】______, while brakes, tyres and roads all create tiny airborne【C6】______as they wear out.
Across the developed world, car use is in decline as more people move to city centres, while young people especially are【C7】______for other means of travel. Researchers are already asking if motor vehicle use has reached its【C8】______and will decline, but transport planners have yet to catch up with this【C9】______, instead of laying new roads to tackle traffic jams. As users of London’s orbital M25 motorway will know, new roads rapidly fill with more traffic. In the US, studies have shown that doubling the size of a road can【C10】______double the traffic, taking us back to the starting point.
A) alternate F) merged K) prematurely
B) crown G) miniatures L) simply
C) determine H) opting M) switching
D) generated I) particles N) synonymous
E) locating J) peak O) trend [br] 【C5】
选项
答案
D
解析
[语法判断]空格位于how引导的宾语从句中,从句的主语是the electricity,不定式短语to run them作后置定语修饰the electricity。空格前是系动词is,how“如何”在从句中作方式状语,从句主语the electricity是物,推断空格处应填入动词过去分词形式和is一起构成被动语态。[语义判断]空格前面提到,电动汽车造成排放的水平取决于它们运行所需要的电力如何______。备选项中只有D)generated“产生电等能量”符合以上要求,故为答案。
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