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  3. The shorter growing seasons expected with climate change over the next 40 years will endanger hundreds of millions of already po

The shorter growing seasons expected with climate change over the next 40 years will endanger hundreds of millions of already po

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问题     The shorter growing seasons expected with climate change over the next 40 years will endanger hundreds of millions of already poor people in the global tropics, say researchers working【C1】________the world’s leading agricultural organisations.
    The effects of climate change are likely to be seen across the entire tropical【C2】________but many areas previously considered to be【C3】________food secure are likely to become highly【C4】________to droughts, extreme weather and higher temperatures, say the researchers with the Consultative Group on International Agricultural Research.
    Intensively farmed areas【C5】________northeast Brazil and Mexico are likely to see their【C6】________growing seasons fall below 120 days, which is critical for crops【C7】________corn to mature. Many other places in Latin America are likely to【C8】________temperatures that are too hot for bean【C9】________, a staple in the region.
    The impact could be【C10】________most in India and southeast Asia. More than 300 million people in south Asia are likely to be affected even with a 5％ decrease in the【C11】________of the growing season.
    Higher peak temperatures are also expected to take a heavy【C12】________on food producers. Today there are 56 million crop-dependent people in parts of west Africa and India who live in areas where, in 40 years, maximum daily temperatures could be【C13】________than 30℃ . This is【C14】________to the maximum temperature that beans can tolerate,【C15】________corn and rice yields suffer when temperatures【C16】________this level.
    "We are starting to see much more clearly【C17】________the effects of climate change on agriculture could【C18】________hunger and poverty," said research leader Parti Kristjanson. "Farmers already【C19】________variable weather by changing their planting schedules. What this study suggests is that the speed of climate【C20】________and the magnitude of the changes required to adapt could be much greater."
【C12】
选项 A、agony
B、toll
C、weight
D、plague
答案B
解析 上下文语义题兼考查固定搭配。上文提到了酷热影响到了一些地区的大豆产量，此处空格前的also一词暗示这里应该讲另一影响对象，即food producers“粮食生产者”，因此，不定式后面的动词短语应能表示“影响”之意，take a heavy toll on sb. /sth，为固定表达，意为“对……造成重大损失”，符合语义。从语义上讲，最高温度的上升可以给粮食生产者带来“痛苦”或“负担”，但A项agony“痛苦”和C项weight“重担：重量”均无法与take a heavy…on构成语义通顺的搭配，故排除。D项plague作“令人头疼的事物”讲时，常用于短语a plague on sb. /sth. ，跟文中的短语结构也不符。
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