【正文】 and by encouraging young families to break away from the older generation and the home munity, we have been able to speed up the acceptance of change and the rapid spread of innovative behaviour. But at the same time we have burdened every small family with tremendous responsibilities once shared within three generations and among a large number of peoplethe nurturing of small children , the emergence of adolescents into adulthood, and care of the sick and disabled and the protection of the aged. What we have failed to realize is that even as we have separated the single family from the larger society, we have expected each couple to take on a range of obligations that traditionally have been shared within a family and a wider munity. So all over the world there are millions of families left alone, as it were, each in its own box parents faced with the specter of what may happen if either one gets sick, children fearful that their parents may end their quarrels with divorce, and emptyhanded old people without any role in the life of the next generation. Then, having reduced little by little to almost nothing the relationship between families and the munity, when families get into trouble because they can’t acplish the impossible , we turn their problems over to impersonal social agencies, which can act only in a fragmented way because they are limited to patchwork programs that often are too late to acplish what is most needed. Individuals and families do get some kind of help, but what they learn and what those who work hard within the framework of social agencies convey, even as they try to help, is that families should be able to care for themselves. 64. According to the author, when younger families are isolated, _____ A old people can easily accept the change. B people keep moving from place to place. C individuals can hardly bee innovative. D economy develops at high speed. 65. What is said to be the major problem facing young couples? A They need to fulfill more obligations. B They are incapable of balancing the budget. C They have their children spoiled and overindulged. D They get emptyhanded after divorce. 66. We know from the second paragraph that ____ A old people are less healthy than the younger generations. B divorce rate of the old people is lower than that of the young. C divorce is possible at a result of quarrels between the parents. D parents care more about the health of their children than their own. 67. It is implied by the author that _____ A social agencies in America can be very helpful. B the help to American families from social agencies is limited. C the government should do more to improve patchwork programs. D the fragmentary nature of the American family’s unique. Passage Four At present rates of demand, the world has enough oil in known and economically viable reserves to last for more than 40 years, enough gas for more than 60 years and enough coal for more than 230 years. Naturally, demand will increase。 but so will reserves as panies explore more widely and costs fall. Since 1970 viable reserves of oil have almost doubled while those of gas have leapt threefold. One distant day a difficult situation will e, but as it approaches fossilfuel prices will rise, making alternative forms of energy, perhaps including nuclear power, petitive. That is no reason to spend on nuclear right now. An oil shocks is a more worrying prospect, despite today’s low oil price and OPEC’s present inability to budge it upwards. However, even if an oil shock is a real danger, building nuclear reactors is not a good way to avert it. A higher oil price would have a relatively small effect on the supply of electricity the only sort of energy that nuclear power can now provide. Just over a tenth of the world’s electricity is generated from oil, and the proportion has steadily fallen since 1970. Transport, by contrast, relies almost entirely upon oil, already swallowing half the world’s oil supply and likely to take an even larger chunk in the future. If the supply of oil were cut off tomorrow, billions of people would find themselves immobile. Relatively few would be without electricity. Besides, there are superior, nonnuclear, ways to prepare for an oil shock. Governments could take advantage of today’s low oil prices to build up their stocks. Especially where congestion and population are serious problems, they could try to restrict the growth of car use, or promote cars which use less fuel. For governments keen to reduce electricity’s remaining dependence on oil still further, there are usually cheaper alternatives to nuclear, such as coal or hydro power. Climate change is a legitimate worry. Although still riddled with uncertainties, the science of climate change is being firmer: put too much carbon in the atmosphere and you might end up cooking the earth, with possibly catastrophic results. But here again, swit