There is no doubt that air pollution is a global crisis: it causes an annual

游客2025-03-26 4

问题 There is no doubt that air pollution is a global crisis: it causes an annual death【C1】______of 6.5 million. That is double the total number of people lost【C2】______HIV/AIDS, tuberculosis and malaria【C3】______, and four times the number killed on the world’s roads. Half the early deaths result from outdoor air pollution that is far more dispersed and harder to【C4】______.
Air pollution has increased the【C5】______of mental illness, diabetes and kidney disease. It is even thought to be prematurely ageing the faces of city dwellers by accelerating wrinkles and age【C6】______. What’s worse, almost 90% of the world’s children live where outdoor air pollution【C7】______WHO limits.
Increasing efforts【C8】______global warming by cutting the fossil fuel consumption will help cut air pollution. Some major world cities are also doing something【C9】______traffic smog by setting dates【C10】______the worst polluting cars will be banned. The huge cuts in health costs that could be achieved with cleaner air are becoming better understood. [br] 【C10】

选项 A、in which
B、for which
C、about which
D、by which

答案 D

解析空白处前面是“确定日期”，后面是“污染车禁行”，所以介词的选定应参考date。本句中，选择in which或about which时介词不合适，选择for which“为了这些日期”则意义不合适，只有by which最合理，意义是“截止”。

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