【正文】
taste. S3: … T: Yes. We can’t see it,but we can feel it. Air is important to all living things. T: Can you talk about air? Work in groups. Ss: talk each other. Take the pupils to answer the questions on Page 69. Step Ⅳ .Consolidation(拓展延伸) Think and say: 模仿課文,介紹一樣。