【題目】閱讀下面材料，在空白處填入適當(dāng)?shù)膬?nèi)容（1個(gè)單詞）或括號內(nèi)單詞的正確形式。

As the population grows and temperatures rise, 【1】 will become more difficult to grow enough food for everyone. 【2】 (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 【3】 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 【4】 (grow) in places that have little rainfall by farmers. The desert 【5】 it grows gets just 15 to 20 centimeters of rain per year, or less. Other kinds of melons need at 【6】 (little )two and a half centimeters per week to grow.

Now scientists 【7】 (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 【8】 (become) warmer and more crowded every day.

Rose Kates says farmers will need 【9】 (produce) 50 to 70 percent more food by 2050 to feed the world. So, he says, 【10】 ( research)are studying the wild versions of farm-grown crops.

【答案】

【1】it

【2】Luckily

【3】to

【4】be grown

【5】where

【6】least

【7】are considering

【8】becoming

【9】to produce

【10】researchers

【解析】

【文章大意】隨著人口的增長和全球氣溫的升高，為人類提供足夠的糧食變得越來越困難。但幸運(yùn)地是科學(xué)家們在研究培育一些新的不需要太多水的農(nóng)作物，而且取得了一定的進(jìn)展。

【1】it 考查人稱代詞。從結(jié)構(gòu)可知句子主語是不定式短語， it作形式主語，填it。

【2】Luckily 考查副詞。修飾整個(gè)句子應(yīng)該用副詞形式，位于句首，首字母要大寫，填Luckily。

【3】to 固定短語：be home to ＂……的家、故鄉(xiāng)、棲息地＂，填to。

【4】be grown 考查被動(dòng)語態(tài)。根據(jù)句意可知是被動(dòng)關(guān)系，含有情態(tài)動(dòng)詞的被動(dòng)形式為：情態(tài)動(dòng)詞+be +done，故填be grown。

【5】where 考查定語從句。定語從句是主謂結(jié)構(gòu)，缺少關(guān)系副詞，先行詞為地點(diǎn)名詞，故填where。

【6】least 考查形容詞。固定短語：at least＂至少＂，填least。

【7】are considering 考查動(dòng)詞時(shí)態(tài)。根據(jù)now判斷用現(xiàn)在進(jìn)行時(shí)，表示目前科學(xué)家們正在做的事情，填are considering。

【8】becoming 考查非謂語動(dòng)詞。從結(jié)構(gòu)判斷此處是非謂語動(dòng)詞短語作定語，become和被修飾名詞planet之間存在主動(dòng)關(guān)系，用現(xiàn)在分詞，填becoming。

【9】to produce 考查非謂語動(dòng)詞。固定搭配：need to do sth＂需要做某事＂，填to produce。

【10】researchers 考查名詞。根據(jù)主謂一致的原則可知此處是復(fù)數(shù)名詞，填researchers。

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