Directions: This part consists of a short passage. In this passage, there are altogether 10 mistakes, one in each numbered line. You may have to change a word, add a word or delete a word. Mark out the mistakes and put the corrections in the blanks provided. If you change a word, cross it out and write the correct word in the corresponding blank. If you add a word, put an insertion mark (∧) in the right place and write the missing word in the blank. If you delete a word, cross it out and put a slash (/) in the blank.

　　Example:

　　Television is rapidly becoming the literature of our periods. 1. time/times/period

　　Many of the arguments having used for the study of literature 2. /

　　as a school subject are valid for  study of television. 3. the

　　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 continue to find

　　fault of such studies and argue that they are inconclusive. 68. ________

　　While Americans seem be happy enough to consume 69. ________

　　food made from GM crops, opinion polls continue to show

　　tht European consumers dislike the idea. Europeans seem be

　　taking the attitude which, since there remains the slightest 70. ________

　　possibility of adverse consequences and since it is clear how 71. ________

　　they, as consumers, benefit from GM crops, they would

　　rather not run the risk.