Asthepopulationgrowsandtemperaturesrise,  61  willbecom...

问题详情：

As the population grows and temperatures rise,   61   will become more difficult to grow enough food for everyone.   62   (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   some 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 describes as terrible.

Coyote melon may not taste good, but it can   64   (grow) in places that have little rainfall by farmers. The desert   65   it grows gets just 15 to 20 centimeters of rain per year, or less. Other kinds of melons need at   66   (little )two and a half centimeters per week to grow.

Now scientists   67   (consider) combining coyote melon with other melons to see if they can make a tasty vegetable that doesn’t need as much water to grow. That could be useful on a planet   68   (become) warmer and more crowded every day.

Rose Kates says farmers will need   69   (produce) 50 to 70 percent more food by 2050 to feed the world. So, he says,   70   ( research)are studying the wild versions of farm-grown crops.

【回答】

  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。

ily  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ily。

  固定短语：be home to“……的家、故乡、栖息地”，填to。

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。

e  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。

t  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。

知识点：语法填空

题型：未分类