1.感谢他得关心;

　　2.介绍情况:(1)去年以来以发生数次雾霾天气(2)人们已认识到雾霾天气的危害，正采取各种举措减少其发生(3)你自己为此做了什么或打算做什么

　　要求150--200词

　　【猜题理由】近年来我国多地雾霾天气不断增多，极大地影响了人们的健康与生活。作为环境保护的一个近期热点话题，雾霾天气符合高考考试要求，也能唤起高中生环保意识。

　　【参考范文】

　　Dear Bill,

　　I’m glad to receive your letter,thank you for your caring for the weather and my health.Now I’d like to tell you something about the smog.

　　Since the winter last year,the smog has occurred a lot of times.it has done great harm to our daily life.many traffic accidents happened just because of the heavy smog weather,more and more people have to go to see the doctor because the serious disease caused by the smog,quite a lot of flights have to be put off,a great number of people have to stay at home for fear of the poisonous air caused by the smog.

　　People have realized the great harm caused by the smog and the importance of protecting the environment.people all over the country are taking measures to reduce the smog weather.the government suggests people go to work or school with the public traffic, such as the bus and the underground.Also we should plant more trees.

　　According to me, I will go to school by bike or on foot, and I won’t throw the waste anywhere.in addition, I will tell the people I meet to protect the environment as possible as they can.would you like to tell me some good ideas?i’m looking forward to your reply.

　　Yours Sincerely

　　LI Hua