2. 外语
  3. Internet has long been the focus of research. Recently, a large study【C1】______that otherwise healthy teenagers are much more【C2

Internet has long been the focus of research. Recently, a large study【C1】______that otherwise healthy teenagers are much more【C2

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问题     Internet has long been the focus of research. Recently, a large study【C1】______that otherwise healthy teenagers are much more【C2】______to depression if they spend too much time【C3】______the Internet.
    Researchers who【C4】______more than 1 000 students at high schools in New York—all of them【C5】______of anxiety and depression at the start of the study—found that after nine months,【C6】______of severe depression among " pathological (病态的)" users were 2.5 times【C7】______of the others.
    The study was published on Aug. 2 in Archives of Pediatrics & Adolescent Medicine. It used self-rating scales to【C8】______anxiety and depression in the process, along with an【C9】______test that asks questions like " How often do you feel depressed,【C10】______or nervous when you are offline, which goes away once you are【C11】______online?"
    Of the 1 041 subjects, 94 percent were【C12】______as normal Internet users and 6 percent as moderately pathological or【C13】______severe risk for addiction. After nine months, 87 students, or 8. 4 percent, developed mild to【C14】______depression.
    While depression is an established risk factor for【C15】______Internet use, the study suggests the【C16】______may also be true, said the lead author, Dr. Lawrence T. Lam, of the School of Medicine, Sydney, in Australia. He【C17】______that users often went days or weeks【C18】______enough sleep, which can【C19】______to depression, and tended to react intensely【C20】______the online game world.
    "Failure in the game-playing is as real as failure in other parts of their life," he said.
【C13】
选项 A、at
B、in
C、with
D、to
答案A
解析 固定搭配题。at risk是常用短语，意为“处于危险中”，符合句意。
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