One possible version:

Travelling

Travelling is a very good activity. When you are free, you can go to a beautiful place to enjoy the beauty of nature. You can breathe the fresh air, meet different people and make friends with them. Thus you will relax.

But travelling is not always pleasant. For example, the weather can be changeable. You may be caught in the rain and may catch a cold in the rain while travelling. You may have your money stolen or may be injured.

Therefore, when going on a trip, you must prepare yourself carefully. You should have clear information about the weather, choose a good travelling companion and be very careful about where you go so as to avoid accidents. If so, you will surely enjoy yourself.

题目分析：本文是篇材料作文。内容要求1．旅游好处很多：领略大自然以及其他城市的美丽风景；呼吸新鲜空气；结交新朋友；放松自己，强身健体；2．旅游常见问题：天气因素；被人偷；可能受伤；3．旅游的准备工作：了解天气情况；找个旅伴(travelling companion)相互照应；小心谨慎；避免意外。由此分析应该用一般现在时，适当用一些情态动词表达感情色彩。全文应该用第二人称形式表示是大众化的人。另外，注意控制字数100词左右。

【亮点说明】该文包含所有的内容要点。同时注意了句子开头的变化。应用了较多的语法结构和词汇。使用了较复杂结构或较高级词汇。 如make friends with，For example，be caught in the rain，while travelling ，so as to等等。有效地使用了语句间的连接成分，使全文结构紧凑。如：thus, but，therefore,if so等等。