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  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 file
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.
【S10】
选项
答案clear→unclear
解析 since前面的and表示前后语意一致，本句要表达的意思是：“因为欧洲人觉得仍然存在使用转基因食物的不良后果，且作为消费者，他们如何从转基因食物中获利也不清楚，所以他们不愿意冒风险(they would rather not run the risk)。”故应将clear改为unclear。
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