unit 5 travelling abroad
导读：随着人们生活水平的提高，越来越多的家庭拥有轿车，但是这也引起了一些问题。 低碳生活(low carbon living)，正是指减少生活作息时所耗用的能量，从而减低碳，特别是二氧化碳的排放。对于我们来说，低碳生活是一种态度，而非能力。
task: what are the
benefits of
cycling？
nowadays, our life is becoming more and more comfortable. more and more families have their own cars. however, an increasing number of cars result in many problems. they not only cause traffic jams, but also produce lots of waste gases, which pollute the air. too many cars are making ou资源难易程度:★★★★★★★★★★★★★★★
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