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  3. What does the hamburger say about our modern food economy? A lot, actually. Over the past several years Waldo Jaquith intended t

What does the hamburger say about our modern food economy? A lot, actually. Over the past several years Waldo Jaquith intended t

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问题     What does the hamburger say about our modern food economy? A lot, actually. Over the past several years Waldo Jaquith intended to make a hamburger from scratch, to no avail. "Further (1)_____ revealed that it’s quite impractical— (2)_____ impossible—to make a hamburger from scratch," he writes. "Tomatoes are in season in the late summer. Lettuce is in season in spring and fall. Large mammals are(3)_____ in early winter. The process of making(4)_____ burger would take nearly a year and would inherently involve omitting some core hamburger(5)_____."
    That the hamburger—our delicious and comforting everyman food—didn’t(6)_____ 100 years ago is a greasy, shiny example of all that is both right (7)_____ wrong with our modern food economy. (8)_____fertilizers, genetically modified crops, concentrated farming operations and global overnight shipping, much of the world was lifted out of starvation(9)_____ it could finally grow(10)_____ quantities of food with decreasing labor(11)_____.
    But these same advances(12)_____ allow food to be grown out of(13)_____ and in all corners of the globe contribute to a whole host of environmental(14)_____. The "industrialization of food," as author Paul Roberts puts it, is an endless cycle driven by very small price(15)_____ that force food processors to(16)_____ more advanced techniques to produce even more food(17)_____ lower prices. This system will only be aggravated as food demand(18)_____. Recently David Tilman and Jason Hill of the University of Minnesota released a study(19)_____ that global food demand could double by 2050. It’s(20)_____ that our current, impractical food economy can sustain that demand.
(15)
选项 A、changes
B、increases
C、variations
D、margins
答案D
解析 空格后的定语从句“价格……会迫使食品加工商采用更先进的技术以较低的成本生产出更多的产品”。“以较低的成本生产出更多的产品”当然是为了提高利润．故推断空格应填入表“利润”的词，margins“利润”符合句意。
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