摘要： (通过学习1b的表格.为学生复述课文打下了基础.) Step 3 Consolidation 第三步 巩固 (根据1b表格.以问答形式复述1a课文.) T: Let’s retell 1a according to the table in 1b by asking and answering. For example: (1) T: What are the advantages and disadvantages of coal? Ss: Cheap, dirty, dangerous. (2) T: Can you say something about nuclear power? Ss: Dangerous and expensive. (3) T: What about animal waste? Ss: Cheap but it smells terrible. (4) T: And electric car? Ss: Work well but can not run for long. (5) T: What are the advantages and disadvantages of Maglev Train? Ss: Quiet, fast, clean but too expensive. (6) T: What about the water trains? Ss: Very cheap but slow. (7) T: What is the main idea of this passage? Can you give a proper title for this passage? Ss: Some different ways of producing power. Step 4 Practice 第四步 练习

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