2. 外语
  3. Kevin Davies sent a sample of his saliva to a genetic testing laboratory in Iceland to learn about his health risks. When he rec

Kevin Davies sent a sample of his saliva to a genetic testing laboratory in Iceland to learn about his health risks. When he rec

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问题    Kevin Davies sent a sample of his saliva to a genetic testing laboratory in Iceland to learn about his health risks. When he received his results, Mr. Davies learned that,【C1】______his genetic makeup, he had an above-average risk of【C2】______prostate cancer.    Out of【C3】______, he checked back three months later and found that the company, called deCODE, had changed its assessment; His risk was now【C4】______average.
   DeCODE had recalculated its algorithm, based on new data. Davies, who is himself a geneticist by training, wasn’t too【C5】______by this about-face: " The information that these companies can give you can change and evolve【C6】______time," he says.
   That isn’t the only way today’s genetic tests offer【C7】______conclusions. According to a US government study, results often vary【C8】______among genetic-testing companies, largely because【C9】______has its own way of choosing and analyzing data.
   When the project to【C10】______human DNA was finally completed in 2003, many predicted a revolution. Drugs could be chosen to match individual patients with maximum therapeutic effect and minimum side effects, the【C11】______of so-called personalized medicine.
  【C12】______a summer downpour of troubling stumbles for genetic-testing companies and programs shows just how long and twisting the road can be【C13】______advances in basic scientific research and their application.
   It also has【C14】______the question of how medicine will be practiced in an era【C15】______anyone can research ailments and treatments on the Internet, sometimes becoming more familiar with new therapies and tests than their physicians.
【C9】
选项 A、that
B、each
C、it
D、such
答案B
解析 本题考查代词的指代。本句的意思是，各个基因测试公司的测试结果间存在广泛的差异主要是因为每一家公司都有自己选择数据和分析数据的方法。这里需要的代词表示“每一家公司”，在这四个选项中，只有B选项符合句意。
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