Question

18．People need to seek out new foods because the world has so many mouths to feed．As of
2015，there are more than seven billion people on Earth，according to the United Nations．
And by 2100 that number may double．Feeding all of these people means not only improving the way food is grown，but also finding new sources of nutrition．
And that quest is becoming ever more urgent.1f nothing changes，within 35 years，the
world's appetite will be greater than the amount of food produced．That's according to a report released last year．It was prepared by the Global Harvest Initiative，a private agriculture group based in Washington，D．C．
Global warming，too，is changing food production．Scientists predict that rising
temperatures will reduce the growth of important crops like wheat，corn and soybeans．Low-income developing countries will be hit the hardest．When harvests fall，crops become more expensive．And since those foods are also used to feed animals like cows and pigs，meat prices too，will rise．
All over the world，researchers are racing against the clock to figure out how best to feed more people in a fast-changing world．And some surprising ideas have begun to come up．WO years ago，scientists introduced the first burger made from meat grown in a lab．
the project cost more than $ 300，000，but it's a start．Other researchers are developing seeds that can survive high temperatures and drought．Still others are finding ways to improve the genes of meat animals so they produce more meat and can stand the heat．
gloomy （悲观的） forecast for the planet isn't the only reason to study foods for the
future．It P s a creative quest that will inspire people who can think in new ways about existing plants and animals even insects．These researchers have used their talents in ways that even they never would have predicted．
28．What do the underlined words"that quest"in paragraph 2 refer to？A
A．The research on food．
B．The increase of population．
C．The variety of nutrition．
D．The change of appetite．
29．How does global warming affect low-income developing countries？D
a．Increase meat prices．b．Raise the temperature．
c．Reduce the growth of crops．d．Lead to the high cost of life．
e．Cause a higher price for crops．
A．d→a→c→d→e           B．c→a→b→d→e
C．d→e→c→a→b           D．b→c→e→a→d
30．What is mainly talked about in Paragraph 4？C
A．New ways of farming．
B．Some great researchers．
C．Progress in food research．
D．Achievements in lab experiments．
31．What will be discussed in the following paragraph？A
A．Examples of successful food researchers．
B．Different opinions about the future food．
C．Methods of dealing with global warming．
D．Possibilities of feeding the present population．

Answer 1

分析 人们需要寻找新的食物，因为世界上有这么多的人要养活．截至2015年，世界人口已超过七十亿人，根据联合国的报告，2100年这个数字可能会翻一番．养活这些人不仅意味着提高粮食种植的方式，而且还可以寻找新的营养来源．

解答 28．A 词义猜测题．根据上文内容可知，人们需要寻找新的食物，因为世界上有这么多的人要养活．养活这些人不仅意味着提高粮食种植的方式，而且还要寻找新的营养来源．所以句中的"这个任务"应指关于粮食的研究，故选A．
29．D 细节理解题．根据第三段内容可知，气温上升将减少小麦、玉米和大豆等重要农作物的增长．低收入的发展中国家将受到最严重的打击，当收成下降，农作物变得越来越昂贵，因为这些食物也被用来喂养像牛和猪一样的动物，所以肉的价格也会上升．因此全球变暖引起气温上升，气温上升导致农作物减产，农作物减产引起粮食和肉价上升，最终导致低收入发展中国家高昂的生活成本，故选D．
30．C 主旨大意题．根据第四段的内容可知，两年前，科学家推出了第一个用实验室培育的肉做成的汉堡．其他研究人员在开发可以经受高温和干旱的种子．还有一些人正在寻找改善肉类动物的基因的方法，这样他们能生产更多的肉和承受高温．所以第四段主要讲了食物研究的进展，故选C．

点评 本文是政治经济类阅读，考查学生对细节的理解把握和推理判断能力，做题时一定要找到文章中的原句，和题干进行比较，再做出正确选择．在做推理判断题时不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．