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air conditioning, throw away, , in fact, , if possible, as long as possible, so that, it’s better to … , change…in to, something else, in one’s neighbourhood, take part in 教學(xué)難點(diǎn) Difficult points So many important phrases 教具 Teaching aids Tape recorder, video, picture 教學(xué)步驟 Teaching steps Step 1. New words Step 2. Look at the picture. Say w