Lesson 38 Water and the traveller 水和旅行者 First listen and then answer the following question. 听录音，然后回答以下问题。 What does this text describe? Contamination of water supplies is usually due to poor sanitation close to wat...
Lesson 37 The process of ageing 衰老过程 First listen and then answer the following question. 听录音，然后回答以下问题。 What is one of the most unpleasant discoveries we make about ourselves as we get older? At the age of twelve year...
Lesson 36 The cost of government 政府的开支 First listen and then answer the following question. 听录音，然后回答以下问题。 What is the most important factor, both in government or business, for keeping running costs low? If a nation...
Lesson 35 Space odyssey 太空探索 First listen and then answer the following question. 听录音，然后回答以下问题。 When will it be possible for us to think seriously about colonising Mars? The Moon is likely to become the industrial hub...
Lesson 34 Adolescence 青春期 First listen and then answer the following question. 听录音，然后回答以下问题。 What do adolescents respect in parents? Parents are often upset when their children praise the homes of their friends and rega...
Lesson 33 Education 教育 First listen and then answer the following question. 听录音，然后回答以下问题。 Why is education democratic in bookless, tribal societies? Education is one of the key words of our time. A man without an educatio...
Lesson 32 Galileo reborn 伽利略的复生 First listen and then answer the following question. 听录音，然后回答以下问题。 What has modified out traditional view of Galileo in recent times? In his own lifetime Galileo was the centre of v...
Lesson 31 The sculptor speaks 雕塑家的语言 First listen and then answer the following question. 听录音，然后回答以下问题。 What do you have to be able to do to appreciate sculpture? Appreciation of sculpture depends upon the ability...
Lesson 19 The stuff of dreams 话说梦的本质 First listen and then answer the following question. 听录音，然后回答以下问题。 What is going on when a person experiences rapid eye-movements during sleep? It is fairly clear that sleeping...
Lesson 18 Porpoises 海豚 First listen and then answer the following question. 听录音，然后回答以下问题。 What would you say is the main characteristic of porpoises? There has long been a superstition among mariners that porpoises will s...
