答案：
One possible version:
Dear Andrew,
Very happy to learn from you and you’re welcome to study in our school for the next two months. As for the question about the transportation to and from school, I’d like to recommend your riding a bicycle. Here are some reasons.
Firstly, riding a bike to and from school is very common among the students, for buying or repairing a bicycle doesn’t cost a lot. Next, parking a bicycle is easy and convenient in our school, no matter who busy the traffic could be. Actually, bicycle-riding is also a practical way to do exercise and protect the environment. What you should do carefully is just to keep an appropriate speed while riding and lock it after you’re off it. In this way, you’ll feel it simple and relaxing to ride a bicycle while you’re here.(112 words)
Hopefully, what I’ve mentioned above could be helpful and wish you a fun time
in our school.
Yours sincerely,
Li Hua
题目分析：写好提纲式作文的关键是认真审题和分析所给的提纲，因此考生首先要认真阅读前面的提示，认清写作要求和提纲之间的关系，要求考生根据所给的写作要求和提纲，确定文章的中心思想，然后紧紧围绕中心思想展开写作。注意文章文体、人称和时态。根据所给提纲，列出要点，并以此为基础充分发挥自己的想象力，灵活运用英语知识，采用不同的表达方式将各要点完整地表述出来，注意主次分明，详略得当。语言力求准确、简洁。根据情景的发展，按顺序安排好材料。同时应选用合适的连接词或过渡词，使文章具有一定的连贯性。温馨提醒：考生必须认真查验是否有漏写情况，有无拼写错误及标点误用等。
【亮点说明】文中使用了非常好的短语和句子为文章增色不少，比如protect the environment ;keep an appropriate speed, wish you a fun time还运用了no matter who及while引导的状语从句及what引导的主语从句等等。并注意了句子的衔接如：Firstly；Actually, In this way等等。
考点：提纲作文。