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1、 Unit one Lesson one: The kiwi第一单元，第一课：无翼鸟精品文档 They show their feelings with sounds.Sometimes people catch dolphins for a large aquarium( an aquarium is a zoo for fish”.People can watch dolphins in a show. Dolphins dont like to be away from theirschool in the aquarium. They are very sad and lonely.精
2、品文档 二单元 第一课我们为什么打哈欠Why do we yawn?Scientists do not spend time studying yawning, that is probably because yawning doesnot hurt. It is just something we do.精品文档 为什么人们会大笑?In India, there are hundreds of laughter club. The people in these clubs get togetherevery morning. First, they stretch their hands
3、 above their heads. Then, they pretendlaugh.Soon everyone is laughingnaturallyP.eople say thatthey feelgood afterlaughing together.Scientists believe that laughter is good for you, why? For one thing, laughter is gooexercise. When you laugh, you exercise muscles in your body. Scientists say that one
4、hundred laughsequal ten minutes of running.When you laugh,you alsobreathedeeply. This helps you relax. That is good for you, too.Why do we laugh? Thatis a hard question to answer. We know that people laughmore oftenin a group.They dontlaugh very oftenwhen they are alone.Manyscientists believe that we use laughter to connect to other people. Laughter helps usfeel part of a group.精品文档 精品文档