题目内容
19.As the population grows and temperatures rise,(61)it will become more ifficult to grow enough food for everyone.(62)Luckily (luck),scientists are now exploring the planet for plants that do not need as much water as today's crops.The Mojave Desert in the U.S is home (63)tosome of these plants.Scientist Heather Rose Kates of the University of Florida is in that desert.She is not collecting the coyote melon(瓜),which she descries as terrible.
Coyote melon may not taste good,but it can (64)be grown (grow) in places that have little rainfall by farmers.The desert (65)where it grows gets just 15to 20centimeters of rain per year,or less.Other kinds of melons need at (66)least (little )two and a half centimeters per week to grow.
Now scientists(67)are considering (consider) combining coyote melon with other melons to see if they can make a tasty vegetle that doesn't need as much water to grow.That could be useful on a planet (68)becoming (become) warmer and more crowded every day.
Rose Kates says farmers will need (69)to produce (produce) 50to 70percent more food by 2050to feed the world.So,he says,(70)researchers ( research)are studying the wild versions of farm-grown crops.
分析 随着人口增加和气温升高,社会对食物的需求量将越来越大,传统的种植方式已经不能满足,一些科学家开始研究一种新型的种植方式,并取得了一定的成效.
解答 61.it; 考查人称代词.从结构可知句子主语是不定式短语,it作形式主语填it.
62.Luckily;考查副词.修饰整个句子应该用副词形式,位于句首,首字母要大写,填.Luckily.
63.to;固定短语:be home to"…的家、故乡、栖息地",填to.
64.be grown;考查被动语态.根据句意可知是被动关系,含有情态动词的被动形式为:情态动词+be+done,故填be grown.
65.where;考查定语从句.定语从句是主谓结构,缺少关系副词,先行词为地点名词,故填where.
66.least;考查形容词.固定短语:at least"至少",填least.
67.are considering;考查动词时态.根据 now 判断用现在进行时,表示目前科学家们正在做的事情,填 are considering.
68.becoming;考查非谓语动词.从结构判断此处是非谓语动词短语作定语,become 和被修饰名词 planet 之 间存在主动关系,用现在分词,填 becoming.
69.to produce;考查非谓语动词.固定搭配:need to do sth"需要做某事",填 to produce.
70.researchers;考查名词.根据主谓一致的原则可知此处是复数名词,填 researchers.
点评 短文改错时首先要通读全文,了解文章基本大意,然后细读短文,分析句子结构和句群关系,运用所掌握的词汇,语法,固定搭配等基础知识找出文中错误并加以修改.
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