1 Chapter 1 Dogs People often say that a dog is man's best friend. Over thousands of years, man has taught his dogs to do many kinds of work besides guarding the home. For example, sheepdogs are famous for their ability to control a flock of hundreds of sheep. Dogs have been used to aid disabled people for centuries. A guide dog can lead its blind owner. Nowadays, dogs can be taught to turn on light switches, open refrigerator doors and dial the telephone for their disabled owners. For the majority of people, however, dogs are simply pets and friends for both young and old members of the family. guard 看守，看护 sheepdog 牧羊犬 flock 群 aid 帮助 disabled 残疾人 century 世纪 guide dog 导盲犬 dial 拨 majority 大多数 狗 人们总是说狗是人类最好的朋友。几千年来，除了看家外，人类还教会了狗去做许多其他的事，例如，牧羊犬就因其可以控制数百只羊的羊群而出名。 狗用来帮助残疾人已有好几个世纪了。导盲犬可以为盲主人引路。现在，人们还教狗为残疾主人打开电灯、开冰箱和拨电话。然而，对于大多数人来说，狗只是家里老人和孩子们的宠物和朋友。 2 Chapter 2 What is Time? （Nursery Rhyme） Time is grain for peasants. Time is wealth for workers. Time is life for doctors. Time is victory for soldiers. Time is knowledge for students. Time is speed for scientists. Time is money for businessmen. Time is everything for all of us. Therefore, seize the time of today! grain 粮食 wealth 财富 victory 胜利 seize 抓住，把握 时间是什么（童谣一首） 对农民来说，时间就是粮食。对工人来说，时间就是财富。对医生来说，时间就是生命。 对士兵来说，时间就是胜利。对学生来说，时间就是知识。对科学家来说，时间就是速度。 对企业家来说，时间就是金钱。对我们大家来说，时间就是一切。因此，把握今天! 3 Chapter 3 A Barbecu e When I was a child, I once went camping with my family in the summer. We decided to make ...
