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: A. I hope so, too. B. Can you give any advice? C. I don't think so. D. What a pity(遗憾). E. I agree. F. What's the weather like today? G. That's OK.