The European Union had not approved a number of genetically modified crops until late 1998. But【C1】______public concern over【C2】

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问题     The European Union had not approved a number of genetically modified crops until late 1998. But【C1】______public concern over【C2】______supposed environmental and health risks led several EU countries to demand a moratorium (暂时禁止)【C3】______imports of any new GM product. By late 1999 there were enough such countries to【C4】______any approvals of GM product.
    Last year, America【C5】______a complaint at the WTO about the moratorium,【C6】______that it was an illegal trade barrier because there was no scientific【C7】______for it. As more studies have been completed on the【C8】______of GM crops, the greens’ case against them has weakened.【C9】______evidence has【C10】______of health risks from eating them. And, overall, the studies have shown that the environmental effects【C11】______modified crops are not always as serious as the greens【C12】______.【C13】______, environmentalists continue to find fault【C14】______such studies and argue that they are【C15】______.
    【C16】______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【C17】______, since there【C18】______the slightest possibility of adverse【C19】______and since it is unclear how they, as consumers, benefit from GM crops, they would rather not【C20】______the risk.
【C11】

选项 A、on
B、of
C、in
D、with

答案B

解析 习惯用法及上下文题本句的意思是: “研究表明,改良后的农作物对环境造成的后果并没有像环保主义者所声称的那样严重。”effect on意为“对……的影响”,effect of 意为“……的后果(影响)”,故选B。
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