It is attempting to think that biotechnology or some other “science of the future” can solve our problems. Before we surrender to that temptation we should remember nuclear power. Only a few generations ago it seemed to promise limitless, cheap and safe energy. Today those promises lie buried in a concrete grave in a place called Chernobyl(切尔诺贝利), in the Ukraine. Biotechnology is unlikely, however, to break its promises in quite the same or such a dangerous way.

　　68.According to the passage, the science of the future is likely to be __________.

　　A. electronics

　　B. biotechnology

　　C. genetic engineering

　　D. nuclear technology

　　69. Organic chemistry helps to produce materials that are __________.

　　A. as good as wool

　　B. as good as an insect’s body

　　C. not as good as natural materials

　　D. better than natural materials.

　　70. According to the passage, it may soon be possible__________.

　　A. to make something as good as human skin

　　B. to produce drugs without side effects

　　C. to transplant human organs

　　D. to make artificial hearts and eyes

　　71. In 1996, Arthur C. Clarke predicted that ___________.

　　A. biological power sources would be put into use soon

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