约2910字。

　　Unit 23 Telephones 
　　一、教学目标与要求
　　了解电话的发展史和现状、电话的工作原理及不同种类的电话和它们各自的优越性；总结名词性从句的用法，是本单元的教学重点。通过对阅读课文的学习，学生应能运用所学语言，描述电话的发展史、电话的工作原理及各种电话的优越性，如：移动电话、无绳电话等。通过对话课的学习与操练，学生进一步巩固有关打电话用语；正确完成练习册安排的练习。
　　二、教学重点与难点
　　1．重点词汇 dial；；chat；hire；wind（v．）；strengthen；recover；distant；lately；inter－rupt；remain；lace；have…on；get together；all the best；have a word with；connect with；in other words；free of charge
　　2．重要句型 1）How a telephone works is a question which not everyone can answer．2）The problem with electrical signals is that they get weaker and weaker as they travel a-long metal wires．
　　3．语法 名词性从句（Noun Clauses） 1）That is why he decided to buy a mobile phone．2）Who made the long distance call to him is not important．3）The fact that we lacgh phones needs to be considered．4）We need to thint what we should say to the callers．
　　4．日常交际用语 打电话（Making telephone calls）1）Hello．Can I speak to Pippa，Please？2）There is no Pippa here．This is 8686087．3）I’m sorry．I think I dialled the wrong number．4）Hold on．I’ll go and get her．5）I called to as if you’d like to come to a lec－ture on Thursday evening at the college． 6）I’ll have to go now．Someone wants to use the phone．All the best．
　　三、课型
　　（一）对话课
　　Ⅰ．教具  录音机、投影仪。
　　Ⅱ．课堂教学设计
　　1．教师通过向学生提出以下问题导入本课：1）I understand that many of you have got telephones at home and you use them a lot．I want you to tell me why you make telephone calls to other people．2）What do you do if you want to make a phone call to somebody？Please describe it in English．（First you pick up the receiver，and then you dial the number/press the button…．） 3）What do you say if you want to speak to somebody on the phone？4）If you happen to be the person that the speaker wants to find，what would you say？5）If the person the speaker wants to find happens to be out，what would you say？6）In what situ－ation do you say：“Hold on，please”？
　　2．准备放对话录音。借助投影片打出以下听前提问： 1）What do you say if you happen to dial the wrong number？2）When and where is the lecture going to be given and what is the lecture about？
　　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）We may say：I’m sorry．I think I dialled the wrong number．2）The lecture is going to be given on Thursday evening at the college and it is about the universe．
　　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。经数分钟练习后，请两三组同学到前面表演，教师予以讲评。教师指导学生归纳本课中有关打电话（Making tele-phone calls）的常用语句（见日常交际用语部分）。
　　4．教师提供如下情景，组织学生编演新的对话：