2. 外语
  3. Genetically modified (GM) foods are foods derived from genetically modified organisms. Genetically modified organisms have had s

Genetically modified (GM) foods are foods derived from genetically modified organisms. Genetically modified organisms have had s

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问题     Genetically modified (GM) foods are foods derived from genetically modified organisms. Genetically modified organisms have had specific changes【C1】________ into their DNA by genetic engineering techniques. GM foods were first put on the market in the early 1990s, but the European Union had not approved a number of genetically modified crops until late 1998. But【C2】________ public concern over their supposed environmental and health risks led several EU countries to demand a moratorium (暂时禁止) on imports of any new GM produce. By late 1999 there were enough such countries to【C3】________ any approvals of GM produce.
    Last year, America【C4】________ a complaint at the WTO about the moratorium, arguing that it was an illegal trade barrier because there was no scientific【C5】________ for it. As more studies have been completed on the effect of GM crops, the greens’ case against them has weakened. And【C6】________ evidence has emerged of health risks from eating them. And, overall, the studies have shown that the environmental effects of modified crops are not always as serious as the greens claim. Nevertheless, environmentalists continue to find fault【C7】________ such studies and argue that they are【C8】________ .
    While Americans seem to be happy enough to consume food made from GM crops, opinion polls continue to show that European consumers dislike the idea. Europeans seem to be taking the attitude that, since there remains the slightest possibility of【C9】________ consequences and since it is unclear how they, as consumers, benefit from GM crops, they would rather not【C10】________ the risk.
    A. basis      B. increasing      C. growing        D. block
    E. filed      F. much            G. introduced     H. base
    I. little     J. inconclusive    K.in              L. with
    M. adverse    N. run             O. bar     
【C3】
选项
答案D
解析 词义辨析题。根据词性，此处应当填入动词原形。可选范围为“block，run，bar”。根据上文可见，欧洲国家都在抵制转基因食品，而下文则是美国对此提出抗议。因此这句话应当是欧洲国家抵制的结果，从语义上分析可选“block”或“bar”，但bar表示“阻碍(强调阻碍前进、发展)”：Poverty bars the way to progress．“贫穷妨碍了进步”；block表示“阻碍；堵塞(强调彻底封死，不让其再进行下去)”，故最佳答案为block。
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