2. 外语
  3. A. accelerate B. arguable C. consequently D. effect E. expected F. extra G. issue H. negligible I. off

A. accelerate B. arguable C. consequently D. effect E. expected F. extra G. issue H. negligible I. off

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问题    A. accelerate   B. arguable    C. consequently   D. effect     E. expected
   F. extra     G. issue     H. negligible     I. offsetting    J. prices
   K. raise     L. rise      M. surprisingly    N. temperatures   O. volume
   Global warming is already cutting substantially into potential crop yields in some countries—to such an extent that it may be a factor in the food price increases that have caused worldwide stress in recent years, researchers suggest in a new study. Wheat yields in recent years were down by more than 10 percent in Russia and by a few percentage points each in India, France and China compared with what they probably would have been without rising 【C1】______, according to the study. Corn yields were off a few percentage points in China, Brazil and France from what would have been 【C2】______, said the researchers, whose findings were published in Friday’s 【C3】______ of the journal Science.
   Some countries saw small gains from the temperature increases, however. And in all agricultural countries, the 【C4】______ carbon dioxide that humans are pumping into the air acted as a fertilizer that encouraged plant growth, 【C5】______ some of the losses from rising temperatures caused by that same greenhouse gas. The study’s authors, 【C6】______, found that when the gains in some countries were weighed against the losses in other countries, the overall global 【C7】______ of climate change has been small so far: losses of a few percentage points for wheat and corn from what they would have been without climate change. The general impact on production of rice and soybeans was 【C8】______, with gains in some regions entirely counterbalancing losses in others.
   But the authors of the study pointed out that temperature increases were expected to  【C9】______ in coming decades, making it likely that the challenges to food production will grow in an era when demand is expected to 【C10】______ sharply.
【C5】
选项
答案I
解析 空格前为完整句子，而空格后为名词短语，因此推测空格处应填入现在分词或介词，与后面名词短语一起构成状语。空格前提到，二氧化碳作为肥料促进植物生长，而空格后则说升温又导致粮食减产。再结合下一句“当把一些国家所获得的增收与其他国家的损失权衡起来考虑”，可知空格所在句讲“减产、增产”是互相抵消的关系，故选offsetting“抵消”。
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