Although many governments try to convince their respective subjects that atomic energy is an acceptable alternative 【21】______

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问题       Although many governments try to convince their respective subjects that atomic energy is an acceptable alternative  【21】______  the burning of fossil fuels, no government has taken the least trouble to explain the dangers. Maybe they are  【22】______  them.  【23】______  the reason, the public must learn by experience, even though this  【24】______  may be catastrophic.
      While it is true that nuclear reactors do not produce visible smoke, it is certainly not  【25】______  that they do not pollute. And the pollution they produce is much more insidious precisely because it is  【26】______  .
       【27】______  inconvenient it may be for governments to publish all the facts, they have no moral excuse for not doing so,  【28】______  they think they are acting in our best interest. At least some of the facts are known, even though they are not widely reported.
      Nuclear reactors produce radioactive water and gases in vast  【29】______  . What  【30】______  all this waste? It is  【31】______  concrete tanks and stored on tank farms. It is  【32】______  in disused salt mines. It is run into fractured rock. It is buried. It is  【33】______  about in special trains. But even when dumped, it has to be kept  【34】______  by sprinklers to stop it from boiling. And the contents of the tanks are, of course, extremely corrosive. The efforts of a fracture in the tank or a failure of the cooling system would be  【35】______  .
      While every effort is made to  【36】______  that radioactive wastes do not escape into the sea or  【37】______  supplies of drinking water, such a leakage would be too horrible  【38】______  contemplate. But even then, governments would, presumably continue to belittle the hazards.
     It seems that  【39】______  governments can get away with not telling the truth, they will continue to keep silent. Nevertheless the people  【40】______  to know the full facts. Do you know what happens to the radioactive waste in your country? No? Well—find out!  
【25】

选项 A、untrue
B、unreal
C、true
D、distrue

答案C

解析 本题考查句意理解。此句是一个while引导的转折句根据上下文可知本句意为“尽管核反应堆不会产生可见的烟雾;但它确实会污染环境。”所以应选C。
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