[填空题]The European Union had approved a number of
genetically modified crops until late 1998. But growing
public concern over its supposed environmental and health 62. ______
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 63. ______
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. 64. ______
As more studies have been completed on the effects of
GM crops, the greens’ case for them has weakened. 65. ______
Much evidence has emerged of health risks from eating them. 66. ______
And, overall, the studies have shown that the environmental
effects on modified crops are not always as serious as the 67. ______
greens claim. Nevertheless, environmentalists contin

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