话题 1. Describe your first ride on a train (描述你第一次乘火车旅游)
2. Talking about a trip you made to a tourist spot (谈论你到一个旅游景点的观光旅行)
3. Writing about one’s experience (写一篇自己的经历)
功能 Being polite (讲礼貌)
须掌握的语法：
1. The –ed form as the attributive (过去分词作定语)
2 Past tense time expressions (一般过去时)
