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song: A RAINBOW [以歌曲提前引入,活躍了課堂氣氛,提高學(xué)習興趣]2.Free talkT: I’ve got a green sweater .Have you got a sweater?S: Yes, I’ve got a green sweater ,too./No ,I haven’t got a sweater .3. Elicitation T: What colour sweater has Sam got? Let’s watch the cartoon.[由此導(dǎo)入課題,播放SB活動1]Ask some questions:A. What colour