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写作素材 滑雪情景对话 Skiing SUE： I'm kind of nervous about this. JOHN： Why？ SUE： What if I go off a cliff？ JOHN： Don't worry about that. It's impossible. All the ski runs are carefully marked. And if there is something that might be dangerous， like a cliff or something， then they often put a fence around it. SUE： I think I'm going to break my leg. JOHN： No， you're not. First I'll ski with you for a half-hour or so. We'll go on the bunny hill. Then you have your lesson at 10：45. SUE： What is the