文章大意:本文主要讲述了转基因食品的定义以及其利弊。
67.The passage mainly talks about________.
A.the world' s food problem
B.the development in biotech
C.the genetically modified foods
D.the way to solve food shortages
答案:C 主旨大意题。由文章大意可知,本文主要讲述了转基因食品的定义以及其利弊。
68.According to the passage, GM foods________.
A.will replace naturally grown foods
B.are far better than naturally grown foods
C.may help to solve the problem of poor nutrition
D.can cause serious trouble in developing countries
答案:C 细节理解题。由最后一段第二句话“Genetic engineering is widely used to produce plants and animals with better nutritional values”可知。
69.The underlined sentence “The genetic genie is out of the bottle.” in Paragraph 2 probably means that________.
A.GM foods are available everywhere
B.the technology in producing GM foods is advanced
C.genetic technology may have uncontrollable powers
D.genetic technology has come out of laboratories into markets
答案:D 猜测词义题。第二段前半部分讲的是转基因食品已经被投入了市场,成为我们生活的一部分。划线句是该段总结句,所以其意思是转基因食品已经从实验室被投入了市场。
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