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TheScience of the Future
Until recently, the 'science of thefuture' was supposed to be electronics and artificial intelligencE.Todayit seems more and more likely that the next great breakthroughs in technologywill be brought through a combination of those two sciences with organic chemistryand genetiC.engineering. This combination is the science of biotechnology.
Organic chemistry enables us to producemarvelous synthetic(合成的) materials.However, it is still difficult to manufacture anythingthat has the capacity of wool to conserve heat and also to absorb moisturE.Nothing that we have been able to produce so far comes anywhere near thecombination of strength, lightness and flexibility that we find in the bodiesof ordinary insects.
Nevertheless, scientists in thelaboratory have already succeeded in 'growing' a material that hasmany of the characteristics of human skin. The next step may wellbe'biotech hearts and eyes' which can replace diseased organs inhuman beings. These will not be rejected by the body, as is the case withorgans from humans.
The application of biotechnology to energyproduction seems even more promising.In 1996 the famous science-fiction writer,Arthur C.Clarke, many of whose previous predictions have come true, said thatwe may soon be able to develop remarkably cheap and renewable sources ofenergy. Some of these power sources will be biological. Clarke and others havewarned us repeatedly that sooner or later we will have to give up our dependenceon non-renewable power sources. Coal, oil and gas are indeedconvenient,However, using them also means creating dangerously high levels ofpollution. It will be impossible to meet the growing demand for energy withoutincreasing that pollution to catastrophic (灾难性的) levels unless we develop power sourcesthat are both cheaper and cleaner.
It is attempting to think that biotechnologyor some other 'science of the future' can Solve our problems. Beforewe surrender to that temptation we should remember nuclear power. Only a fewgenerations ago it seemed to promise limitless, cheap and safe energy.Todaythose promises lie buried in a concrete grave in a place called Chernobyl, in the UkrainE.Biotechnology is unlikely,however, to break its promises in quite the same or such a dangerous way.
第 41 题 According to the passage, the science of the future is likely to be
A.electronics.
B.biotechnology.
C.genetic engineering.
D.nuclear technology.

A.engineering.
B.
Organic
C.However,
D.Nothing
E.
Nevertheless,
F.
The
G.In
H.Clarke,
I.
It
J.Todaythose
K.electronics.
B.biotechnology.
C.genetic
L.
D.nuclear

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U.S. Blacks Hard-hit by CancerDeath rates for cancer are falling for all Americans, but black Americans are still more likely to die of cancer than whites, the American Cancer Society said Monday.In a special report on cancer and blacks, the organization said blacks are usually diagnosed with cancer later than whites, and they are more likely to die of the diseasE.This could be because of unequal (不平等的) access to medical care, because blacks are more likely to have other diseases as well, and perhaps because of differences in the biology (生物学) of the cancer itself, the report addeD.'In general, black Americans have less hope of surviving five years after diagnosis than whites for all cancer sites and all stages of diagnosis,' the report saiD.'In describing cancer statistics for black Americans, this report recogizes that many of the differences associated with race may be caused by unfair social and economic differences and unequal access to medical carE.'The cancer society said blacks should be encouraged to get check-ups (体格检查)earlier, when cancer is more treatable, and it said more research is needed to see if biological differences play a rolE.'The new statistics emphasize the continuing importance of wiping out these unfair social differences through public policy and education efforts,'the organization said in a statement.But it also noted a drop in cancer death rates.'Cancer death rates in both sexes for all sites combined have dropped greatly among black Americans since 1992, as have incidence rates (发生率),' said the report.第 31 题 Black Americans are more likely to die of cancer thanA.people in other countries.B.white Americans.C.all other Americans.D.their ancestors.

A.S.
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This
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But
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Conservation or Wasted Effort?The black robin(旅鸫)is one of the world's rarest birds. It is a small, wild bird, and it lives only on the island of Little Mangere, off the coast of New ZealanD.In 1967 there were about fifty black robins there; in 1977 there were fewer than ten.___________(46)Energetic steps are being taken to preserve the black robin. ___________(47) The idea is to buy another island nearby as a special home, a 'reserve', for threatened wild life, including black robins. The organizers say .that Little Mangere should then be restocked (重新准备) with the robin's fooD.Thousands of the required plants are at present being cultivated in New ZealanD.Is all this concern a waste of human effort? ___________(48) Are we losing our sense of what is reasonable and what is unreasonable?In the earth's long, long past hundreds of kinds of creatures have evolved, risen to a degree of success and died out. In the long, long future there will be many new and different forms of lifE.Those creatures that adapt themselves successfully to what the earth offers will survive for a long timE.___________ (49) This is nature's proven method of operation.The rule of selection---'the survival of the fittest'--is the one by which human beings have themselves arrived on the scenE.We, being one of the most adaptable creatures the earth has yet produced, may last longer than most.___________ (50) You may take it as another rule that when, at last, human beings show signs of dying out, no other creature will extend a paw (爪) to postpone our departurE.On the contrary, we will be hurried out.Life seems to have grown too tough for black robins. I leave you to judge whether we should try to do anything about it.A.Some creatures, certain small animals,insects and birds, will almost certainly outlast (比……长久) man, for they seem even more adaptablE.B.Those that fail to meet the challenges will disappear early.C.Detailed studies are going on, and a public appeal for money has been madE.D.Both represent orders in the classification of lifE.E.Is it any business of ours whether the black robin survives or dies out?F.These are the only black robins left in the worlD.第 46 题请选择（46）处的最佳答案．

A.In
B.___________(46)
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Is
F.
The
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H.
Life
I.Some
J.
B.Those
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C.Detailed
L.
D.Both
M.
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N.