2. 考研
  3. It’s easy to scare people about what’s in their food, but the danger is almost never real. And the【C1】________itself kills.

It’s easy to scare people about what’s in their food, but the danger is almost never real. And the【C1】________itself kills.

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问题     It’s easy to scare people about what’s in their food, but the danger is almost never real. And the【C1】________itself kills.
    Take the panic【C2】________genetically modified organisms, or GMOs. Ninety percent of all corn grown in America is genetically modified now. That means it grew from a seed that scientists【C3】________by playing with its genes. The new genes may make corn grow faster, or they may make it less【C4】________to bugs so farmers can use【C5】________pest-killing chemicals.
    This【C6】________some people. GMOs are "unnatural," they say. A【C7】________from the movie "Seeds of Death" warns that eating GMOs "causes multiple organ system【C8】________."
    Michael Hansen of Consumer Reports sounds al-most as【C9】________when he talks about GMOs. He says, "You can’t control【C10】________you’re inserting that genetic information; it can have different effects【C11】________on the location."
    Jon Entine of Genetic Literacy Project responds: "We’ve eaten about 7 trillion meals in the 18 years【C12】________GMOs first came on the market. There’s not one documented instance of someone getting so【C13】________as a cough."
    Given all the fear from【C14】________and activists, you might be surprised to learn that most serious scientists【C15】________with him. "There have been about 2,000 studies," says Entine, and "there is no【C16】________of human harm in a major peer-reviewed journal."
    That might be enough to reassure people if they knew how widespread and familiar GMOs really are—but【C17】________they think of GMOs as something strange and new, they think more tests are needed.
    【C18】________people don’t worry about crops bred in【C19】________varieties for centuries without farmers having any idea exactly what genetic changes【C20】________  
【C20】
选项 A、reserved
B、generated
C、witnessed
D、occurred
答案D
解析 结合前面分析，知道本段首句跟最后一句是对照的，因此they knew how wide spread and familiar GMOs really are与without farmers having any idea exactly what genetic changes在意思上也是相对的，故GMOs应与what genetic changes意思相近。GMOs是基因发生了改变的作物，故此处也表示基因“发生”了变化，应选D项occurred“发生”。B项generated也表示“产生”，但该词为及物动词，后需接宾语，因此排除。A项reserved“保留，预定”和C项witnessed“目睹，见证”，跟changes都不能搭配，故排除。
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