约3770字。

　　Unit 24 The science of farming
　　　一、教学目标与要求
　　通过本单元教学，继续学习、巩固有关直接引语和间接引语的内容。学生应能熟练地把直接引语转换为间接引语。复习有关谈论天气的话题，能熟练的描述各种天气。通过对课文的学习，让学生了解我国历史上农业发展的情况，并能用英语进行简单描述。
　　二、教学重点与难点
　　1．重点词汇develop；experience；t of；point out；turn over；go against；a-gree to do ；now and then
　　2．重要句型 1）The soil should also be turned over with a fork so that the weedswould be destroyed．2）The book，which has 110 000 characters，is about both farming andgardening．
　　3．语法 间接引语：1）He said that the best seed-heads should be hung up to dry．2）They asked him if it was a good idea to sow wheat close together．3）They asked him whenhe harvested the wheat．4）He advised/told farmers to do things at the right time of year．
　　4．日常交际用语 谈论天气（Talking about the weather）：1）It’s a beautiful day today．2）It’s going to be dry and sunny for the next two days．3）What’s the weather going to belike at the weekend？4）They say it’s going to be wet and windy．
　　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）Have you ever been to a farmbefore？2）When we talt the farm，what words can you think of？
　　可将学生给出的词语列在黑板上，借以复习相关词汇。如学生没提及天气情况，教师可用问题加以引导：Good！You’ve given me a lot of words that have something to do with farm-ing．What about the weather？Do you think that weather is important in farming？Why？
　　2．准备放对话录音。借助投影片打出以下听前提问：1）What’s the weather like for thenext two days？2）What’s the weather going to be like at the weekend？
　　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）It’s going to be dry and sunny for the next two days．2）It’s going to be wet andwindy．
　　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。
　　教师指导学生归纳在本课中有关谈论天气情况的常用语句（见日常交际用语部分），并提供新的情景，由学生编小对话。
　　情景1：You are supposed to plant trees with your classmates tomorrow．Now you aretalking about the weather reports with your classmates and discuss what to do if it rains to-morrow．
　　情景2：You and your friends are planning a trip to the country by bike this coming Sun-day．From the weather reports you already know that it is going to be fine in the morningand there will be a strong wind in the afternoon．
　　Talk with your friends and make a careful plan about your trip．
　　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。
　　4．要求学生将该课对话以狄克为第一人称的角度，改写为一篇短文。教师可