Unit 4 Global Warming Period 4 Using LanguageLearning aims: 1. Know well the global warming2. Enable the students to talk about different sources of energy.Important point: Learning about effect the global warming brings human being.Difficult point: To improve the skills of reading.使用说明及学法指导：1. 通过阅读课本 P30，完成预习案。2. 完成时间：30 分钟。预习案 Previewing CaseTask1 重点单词及短语翻译代表……一方______________提倡; 主张_________ 承诺；交托___________贡献___________忍受______________________ 污染______________等等_____________只有________________有影响；很重要_______________________ 增长________________ 环境________________随便的，不经心_____________使恢复_________________教育家_______________ 微波炉__________________ 吸收______________可回收材料________________________Task 2 Scan the first e-mail, answer the two questions and get the main idea.1) Who are the writers of the letter? __________________________2) What is the purpose of writing the letters? _____________________________3) Main idea: The letter is written by__________________________________________________________________________________________________________________________________________Task 3 Scan the second e-mail, answer the two questions and get the main idea.1) Who are the writers of the letter? __________________________2) What is the purpose of writing the letters? _____________________________3) Main idea: The letter is written by __________________________________________________________________________________________________________________________________________Task 4 Read the second e-mail carefully and fill in the blanks.1) Turn a(n) _________________ off when you’re not using it. 2) Put on more clothes instead of turning up the__________.3) Walk or _________ instead of taking motor vehicles. 4)...
