约3700字。

　　Unit 17 Nature 
　　一、教学目标与要求
　　通过本单元教学，使学生了解并初步掌握现在进行时被动语态的用法，并运用到语言实践中，如会话、短文写作等。复习本单元出现的表示打算和目的的用语。经过课文的学习，学生应能用所学语言描述糜鹿的今昔对比，从而使学生了解保护野生动物的意义。完成练习册安排的练习。
　　二、教学重点与难点
　　1．重点词汇 increase；disappear；alive ；research； protect； put on performances； atpresent； one after another
　　2．重要句型 1） How long will it ta to complete the trip？ 2） We want to givesome money to this project so that the number of these deer in China can be increased． 3） Itis hoped that one day they will have enough animals to set them free and let them live in thewild again．
　　3．语法 理解并初步掌握现在进行时被动语态的用法： 1） The life of the milu is beingstudied at present． 2） More milu deer are being moved to a new large nature park in Shishouin Hubei Province．
　　4．日常交际用语 打算和目的（Intentions and purposes）； 1） Why are you making thisjourney？ 2） We are trying to collect the money for a wildlife project． 3） We want to… sothat… 4） What is the purpose of your new project？ 5） That sounds a good idea． 6） Goodluck with your trip！
　　三、课型
　　（一）对话课
　　Ⅰ．教具 录音机，投影仪。
　　Ⅱ．课堂教学设计
　　1．教师通过以下步骤导入本课：
　　向学生提出下列问题： 1） Do you like travelling with your friends by bike？ 2） What arethe advantages（good points） of travelling by bisually what is the purpose of travel－ling？ Now listen to the dialogue and find out why they are making this journey．
　　2．准备放对话录音。借助投影片打出以下听前提问： 1） Why are they making this jour－ney？ 2） What will the money be used for？
　　放录音一至两遍，请学生回答上述问题，教师予以必要订正。
　　Key： 1） They are trying to collect money for a wildlife project． 2） The money will beused for an important project of protecting milu deer．
　　根据本课对话内容，教师再提出一些问题，检查学生的理解程度。
　　1） Where are they going to travel？ 2） How many of them are in this group？ 3） Who arethey and where are they from？ 4） How long will it take them to complete the trip？
　　3．再次放对话录音，学生跟读。将学生分为两人一组练习对话。数分钟后，请两、三组同学到前面表演。
　　经数分钟练习后，教师可请几位同学到前面进行表演，教师予以讲评。
　　教师指导学生归纳本课中有关提出打算和目的的常用语句（见日常交际用语部分）。也可以为学生设计一些活动，启发同学运用这部分语言编写对话。
　　情景 1： Someone is going to make a trip to his hometown． Ask him what he plans to dothere； how and when he is leaving and what time he wants to come back．
　　情景 2： Group 4 students plan to sell morning newspapers during their summer holi－days． Ask them when they will start doing so and the purpose of doing so． Also ask themwhat they will do with the money they earn．