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and the flexibility accurate use. Keypoints and difficult points Keypoints difficult points 四 、 Teaching Methods and Studying Methods Teaching Methods teaching methods conversation law taskbased teaching Studying Methods learning method 2. Investigation 3. Communicative 五、 Teaching process Song, he dared to arouse the old Context, the promotion of innovation Video presented and most Activities will extend plant more trees cut down too many trees grow more grass hunt wild animals eat wild animals save water use things made of paper We should use things made of paper. use t