根据对话内容，从方框中所给的七个选项中选出五个句子补全对话，使对话完整、通顺。并将所选标号在对话后面的横线上。 Li Yang: Good morning, Mathew. Mathew: Good morning, Li Yang. 小题1: Li Yang: There's still smog（雾霾）today. We'll have to go to school with face masks（口罩）． Mathew: 小题2: According to the news, PM2.5 pollution is the main problem with air pollution. Li Yang: Yes, and air pollution has done harm to people's health. Mathew: So the Chinese government and Chinese people must take action to fight it. Ji Yang: 小题3: Mathew: Since PM2.5 is mainly caused by vehicles（机动车）and factories, cars with large emissions（排放）should not be allowed and factories should be closely watched. Li Yang: 小题4: We hope that more and more people will join us in making the blue skies return for good. Mathew: 小题5:
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小题1:F
小题2:D
小题3:B
小题4:E
小题5:A
试题解析：本文大意：今天的天气怎么样？今天仍有雾霾，我们将不得不戴口罩上学。通过新闻得知，PM2.5主要是主要问题空气污染。空气污染已经对人们的身体健康产生的危害。因为PM2.5主要是由机动车、工厂引起的，大排量的汽车大量应该禁止，工厂应该密切关注PM2.5的排放。希望越来越多的人加入到我们中来，使兰天空气变好。
小题1:推理判断题。句意：今天的天气怎么样？根据There's still smog（雾霾）today.今天仍有雾霾，可知答案选F.
小题2:推理判断题。句意：真遗憾！根据 We'll have to go to school with face mask我们将不得不戴口罩上学，可知答案选D.
小题3:推理判断题。句意：你能提些建议吗？根据Since PM2.5 is mainly caused by vehicles（机动车）and factories, cars with large emissions（排放）should not be allowed and factories should be closely watched.PM2.5主要是由机动车、工厂引起的，大排量的汽车大量应该禁止，工厂应该密切关注PM2.5的排放，可知答案选B.
小题4:推理判断题。句意：我同意你的说法。根据We hope that more and more people will join us in making the blue skies return for good.我希望越来越多的人加入到我们中来，使兰天空气变好，可知答案选E.
小题5:推理判断题。句意：我也希望如此。根据We hope that……我希望……，可知答案选A.