书面表达（计15分）
现在汽车越来越多，对空气产生极大影响。某网站在开展出行方式大讨论。假如你是李雷，你喜欢哪种出行方式？请根据提示词语和相关问题，给网站投稿。稿件的开头和结尾已给出，其词数不计入总词数。
提示词语：expensive, relax, easy, be good for, reduce, save energy
How do you go to school, by car, by bus, by bike or on foot?
Which way is the best?
What are the advantages?
Dear Editor,
I know you are organizing a discussion about the ways of going out. I’m a middle school student and I want to join the discussion.