Poverty,disease and conflict have historically threatened food security. Now,rising food prices and issues like climate change add to these threats.

    A new study warns of future losses in world food production because of crop damage from changes in the weather. William Cline wrote the study from the Centre for Global Development in Washington. He says countries closest to the equator will be hardest hit. For example,he predicts that if nothing is done,global warming could cut India5 s food production by up to forty percent by the year 2080. Africa and Latin America could lose twenty percent or more.

   Governments concerned about global warming and dependence on oil are investing in biofuels from com and other plants. But Lester Brown at the Earth Policy Institute in Washington says demand for fuel crops is pushing up food prices. He says the worlds eight hundred sixty million automobile owners are now in direct competition with the two billion poorest people.

   This comes as grain supplies are at their lowest level in years. Experts see a number of reasons. These include no enough investment in agricultural technology,a loss of farmland to development,droughts and floods made worse by climate change and growing competition for water.

   Population growth also means a greater demand on food supplies. The United Nations predicts a population of more than eight billion by the year 2030.

56. Now are becoming threats to food security.

   A. poverty and disease

   B. disease and conflict

   C. conflict and climate change

   D. climate change and rising food prices

57. will suffer from the changes in the weather most.

   A. Countries closest to the equator

   B. Africa

   C. Latin America

   D. Asian countries

58. The passage is developed by .

   A. comparing   B. contrast

   C. analysing   D. definition

59. According to Lester Brown, is also a threat to food security.

   A. global warming

   B. the competition between the automobile owners and the two billion poorest people

   C. demand for fuel crops

   D. not enough investment in agricultural technology

60. Which of the following doesn’t belong to the reasons why grain supplies are at the lowest level?

   A. Farmland is for other use.

   B. Not enough investment.

   C. Enough water is becoming hard to get.

   D. The need of grain is becoming greater.

56. D 57. A 58. C 59. C 60. D

56. D解析：細節(jié)理解題。題干中的時間狀 語now對答案進行了限制。由第一段中的 “ Now,rising food prices and." 可得出答案。

57. A解析:細節(jié)理解題。由第二段中的“He says countries closest to the equator will be hardest hit. ” 可知答案。

58. C解析：推理判斷題。文章先提出food security問題，然后分析其原因，因此文章 是通過分析來展開的。

59. C 解析：細節(jié)理解題。由第三段中的 “demand for fuel crops is pushing up food prices. ”可知答案。

60. D解析:細節(jié)理解題。由第四段中的“no enough investment in agricultural technologyM 可知B是原因之一；由“ a loss of farmland to development”可知A為原因之一；由 “growing competition for water” 可知 C 為 原因之一，因此答案為 D.

題目來源：2016年周測月考直通高考高中英語必修3外研版 > 周測月考卷4 階段性測試（一）

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