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.
【C15】
选项 A、that
B、which
C、where
D、when
答案D
解析 本题是一道语法题，考查关系词的用法。A和B是关系代词；C和D是关系副词，分别表示地点和时间。该空白处需要的是一个时间关系副词。
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