22. A growing number of people are beginning to realize that wealth is not the sole prerequisite for happiness.越来越多的人开始意识到财富不是幸福的惟一先决条件。

　　23. In spite of the extraordinary progress made in science and technology , problems remain in terms of guaranteeing that achievements benefit the greatest number of people.尽管科学技术取得了非凡的进步，但是在保证进步成果使尽可能多的人受益这方面还存在一些问题。

　　24. A famous thinker once wrote that " the greatest threat to mankind is mankind itself ! " If this is indeed the case , then the current situation should make us ponder our futuer existence.一位著名的思想家曾经写道：“对人类最大的威胁是人类自身！”如果事实确实如此，那么，现状应该促使我们对我们未来的生存进行思索了。

　　25. U.S. President Harry Truman once remarked : " The buck stops here ! " His view has been confirmed by numerous world leaders who have assumed full responsibility for their actions.美国总统杜鲁门曾经说过：“责任止于此！”(意为勿再把责任往别处推，这是杜鲁门办公室桌上的座右铭)他的观点得到了很多对自己的行动承担完全责任的世界领袖的肯定。

　　26. Large families were once seen as a blessing． Today , however , things are changing and an increasing number of Chinese parents realize that fewer is better．大家庭曾经被看做是一种福气。然而，今天，情况改变了，越来越多的中国家长意识到家庭成员越少越好。

　　27. People used to place total reliance on the government． The so-called " iron rice bowl " prevailed in the past , but things are quite different today.过去，人们习惯完全依靠政府。以前盛行所谓的“铁饭碗”，但今天的情况有很大的不同。

　　28. Several years ago , Chinese streets were filled with people wearing identical drab clothing. Today , however , things are quite different and the streets are awash with people wearing fashionable bright colored outfits. Why has the change taken place ?许多年前，中国大街上的人都穿一样的灰褐色衣服。然而，今天的情况大不一样了，街上满是一个个身穿色彩艳丽的时髦衣服的人。出现这种变化的原因是什么呢？