The European Union had approved a number of genetically

　　modified crops until late 1998. But growing public concern

　　over its supposed environmental and health risks led several 1.

　　EU countries to demand a moratorium (暫時禁止) on imports

　　of any new GM produce. By late 1999 there were enough such

　　country to block any new approvals of GM produce. 2.

　　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. 3.

　　As more studies have been completed on the effects

　　of GM crops, the greens’ case for them has weakened. 4.

　　Much evidence has emerged of health risks from eating 5.

　　them. And, overall, the studies have shown that the

　　environmental effects on modified crops are not always 6.

　　as serious as the greens claim. Nevertheless, environmentalists

　　continue to find fault of such studies and argue that 7.

　　they are inconclusive.

　　While Americans seem happy enough to consume food made

　　from GM crops, opinion polls continue to show that European

　　consumers dislike the idea. Europeans seem be taking the attitude 8.

　　which , since there remains the slightest possibility of adverse 9.

　　consequences and since it is clear how they, as consumers, benefit 10.

　　from GM crops, they would rather not run the risk.

　　答案：
　　1. its改為their
　　2. country改為countries
　　3. base 改為basis
　　4. for 改為 against
　　5. much 改為little
　　6. on 改為of
　　7. of 改with
　　8. seem后面加to
　　9. which 改為that
　　10. clear 改為unclear或者前面加not

　　解析：
　　1. 本題考查了大家識別代詞所指的能力，its 指代genetically modified crops(為復(fù)數(shù)), 所以應(yīng)該改成their；

　　2. such country是指前面要求暫停進(jìn)口轉(zhuǎn)基因農(nóng)產(chǎn)品的某些歐盟國家, 所以應(yīng)該改成復(fù)數(shù)；

　　3. 此處意為： 因?yàn)闆]有科學(xué)根據(jù)支持暫停(進(jìn)口), it 指the moratorium； base 基礎(chǔ), 基地, 根據(jù)地；basis (for) 基礎(chǔ), 基本, 根據(jù); 科學(xué)根據(jù)只能說scientific basis, 有的同學(xué)把base 后面的for 改為 on , 應(yīng)該是受到了base on 這個短語的影響；

　　4. the greens = the environmentalists 環(huán)保主義者。 Case 論點(diǎn)，論據(jù)， case for 后面的them指GM crops, case for sth. 支持某物的論點(diǎn)，case against sth. 反對某物的論點(diǎn)(削弱了)；

　　5. 邏輯錯誤，本句正常語序?yàn)镸uch evidence of health risks from eating them has emerged. 根據(jù)And, overall, 或后的語意，此行應(yīng)該把much 改為little, 說明沒有什么跡象、根據(jù)表明吃GM crops對健康有什么危險；

　　6. 本句的意思為：研究表明modified crops對環(huán)境造成的后果并沒有環(huán)保主義者所聲稱的那樣嚴(yán)重。 Environmental effects of modified crops (modified crops對環(huán)境造成的后果); 很多同學(xué)看到effects 以為后面一定跟on 就錯了；

　　7. find fault with 批評，找茬；

　　8. seem to be taking固定結(jié)構(gòu)，be 不能少；

　　9. taking the attitude that ..后為同位語從句，不能用which；

　　10. 注意since 前面的and 表示前后語意一致。 因?yàn)闅W洲人覺得仍然存在使用GM food的不利后果，并且他們作為消費(fèi)者從GM food中會如何獲得好處也不清楚，所以他們不愿意冒風(fēng)險。