假设你叫刘京，是美国中学生托尼的笔友，你收到了他的来信。请给托尼写一封回信，回答他的问题，介绍北京良好的公交服务，并谈谈你的感受。　
Hi! Liu Jing,
     My grandpa is going to Beijing next month because he ahs heard a lot about the city and he would like to see it himself. He says the bus service in Beijing is very good now, and people can go to anywhere by bus. Is he right? Can you tell me something more about it?
     I’m looking forward to hearing from you soon.
Yours,
Tony

Hi! Tony,
     I’m glad to know your grandpa is coming to Beijing.                                              
                                                                                                                                   
     If you have more questions, please ask me.
Yours,
Liu Jing

参考范文

Dear Tony,

     I’m glad to know your grandpa is coming to Beijing.

     Your grandpa is right. The bus service in Beijing is really good now. There are bus lines all over Beijing and buses can even take you to a small village. Besides, special seats are offered on buses. People do not have to spend a long time waiting for a bus and the tickets are cheap.

     I like taking a bus because I think it’s comfortable and also good for the environment. So it’s a good choice for your grandpa to travel in Beijing.

     If you have more questions, please ask me.

Yours,
Liu Jing