2. 外语
  3. The European Union had approved a number of genetically modified crops until late 1998. But growing public concern over its supp

The European Union had approved a number of genetically modified crops until late 1998. But growing public concern over its supp

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问题     The European Union had approved a number of
genetically modified crops until late 1998. But growing
public concern over its supposed environmental and health         【S1】______
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 country to block any new approvals         【S2】______
of GM produce. Last year, America filed a complaint at the
WTO about the moratorium, arguing that it was an illegal
trade barrier because there is no scientific base for it.         【S3】______
    As more studies have been completed on the effects of
GM crops, the greens’ case for them has weakened.                 【S4】______
Much evidence has emerged of health risks from eating them.       【S5】______
And, overall, the studies have shown that the environmental
effects on modified crops are not always as serious as the        【S6】______
greens claim. Nevertheless, environmentalists continue to find
fault of such studies and argue that they are inconclusive.       【S7】______
    While Americans seem be happy enough to consume               【S8】______
food made from GM crops, opinion polls continue to show
that European consumers dislike the idea. Europeans seem be
taking the attitude which, since there remains the slightest      【S9】______
possibility of adverse consequences and since it is clear how     【S10】______
they, as consumers, benefit from GM crops, they would
rather not run the risk.
【S6】
选项
答案on→of
解析 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称的那样严重。” effect on意为“对……有影响”，effect of意为“……的后果”，所以应将on改为of。
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