______hot weather may cause serious health problems associated with air pollution? ______a weather warning system is establishe

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问题 ______hot weather may cause serious health problems associated with air pollution?
______a weather warning system is established to help people away from danger heat?

选项 A、 
B、 
C、 
D、 

答案C

解析 题句信息对应于Report 3(C部分)倒数第三句:The government has established a weather warning system...other fragile people,即法国政府建立了一套天气预警系统。
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