Being plugged into an iPod is a feature of adolescence. A new study suggests that teens who spend too much time listening to mus

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问题     Being plugged into an iPod is a feature of adolescence. A new study suggests that teens who spend too much time listening to music may be at higher risk of depression.
    The study found that teens who reported listening to music more often—【C1】________using other types of media like TV and books—were more likely to have major depressive disorder,【C2】________with teens who listened to music less frequently. With each level increase in music use, teens had an 80% higher risk of depression, the study found. The study didn’t measure【C3】________listening times, but based on previous data, the study authors【C4】________that teens in the highest-use group were likely listening to music【C5】________at least four or five hours a day.
    At this【C6】________it is not clear whether depressed people begin to listen to more music to【C7】________or whether listening to large【C8】________of music can lead to depression,  or  both.【C9】________researchers  found  that reading books had the opposite【C10】________: with time spent in reading increasing, teens’ risk of depression【C11】________50%. This is worth emphasizing because overall in the U.S., reading books is decreasing,【C12】________nearly all other forms of media use are increasing.
    For the study, the researchers【C13】________106 participants aged 7 to 17 for two months; 46 participants had been previously【C14】________with depression. Throughout the course of the study, researchers made【C15】________weekend phone calls to the teens in order to determine, in real time, what forms of media they were using,【C16】________television, music, video games, Internet, magazines and books. On average, teens were most likely to be watching a movie or TV when researchers called (26% of the time). Teens reported listening to music 9% of the time, followed by Internet use and video gaming (6% each) and,【C17】________, reading printed media (0.2%).
    Of all the media reported, only music showed【C18】________associations  with  increased  depression  risk,【C19】________researchers had control of【C20】________like age, sex and race.
【C3】

选项 A、casual
B、spare
C、total
D、additional

答案C

解析 此空格描述青少年听音乐的时间。下文提到“根据之前的数据,那些听音乐时间最长的青少年每天听音乐的时间有4到5个小时”,由此可推测研究没有测算总共花在听音乐上的时间,故答案为C项total“一共”。A项casual“偶然的”本身就有时间的含义,不能再与times搭配。下文讲到“……每天听音乐的时间有4到5个小时”,可推断这里讲的是一天内听歌的总时间,所以排除B项spare“空余的”和D项additional“额外的”。
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