2. 外语
  3. Whether you think you need daytime rest or not, picking up a nap(午睡)habit is a smart, healthy move. The Mayo Clinic says naps【C1

Whether you think you need daytime rest or not, picking up a nap(午睡)habit is a smart, healthy move. The Mayo Clinic says naps【C1

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问题     Whether you think you need daytime rest or not, picking up a nap(午睡)habit is a smart, healthy move. The Mayo Clinic says naps【C1】______ relaxation, better mood and alertness, and a sharper working【C2】______ . A 2008 British study found that compared to getting more nighttime sleep, a mid-day nap was the best way to cope【C3】______ the mid-afternoon sleepiness.
    According to the Harvard Health Letter, several studies have shown that people【C4】______ new information better when they take a nap shortly after learning it. And, most【C5】______ , a 2007 study of nearly 24, 000 Greek adults in the Archives of Internal Medicine found that people who napped【C6】______ had a 37 percent reduced risk of dying【C7】______ heart disease compared to people who didn’t nap.
    Of course, napping isn’t【C8】______ for everyone. If you’re suffering from inability to sleep, naps that are too long or taken too late in the day can【C9】______ with your ability to fall or stay asleep at night.
    But for most, naps can make you feel sharper and happier. Naps provide different benefits,【C10】______ on how long they are. A 20-minute nap will boost alertness and concentration; a 90-minute snooze(小睡)can【C11】______ creativity.
    According to prevention, com, you【C12】______ a natural dip in body temperature【C13】______ 1 p. m. and 3 p. m. A short nap at this time can boost alertness【C14】______ several hours and, for most people, shouldn’t【C15】______ being able to fall asleep at night.
    Pick a dark, nice place that’s not too warm or too chilly. Prevention, com【C16】______ napping on the couch instead of in bed, so you’re less【C17】______ to snooze for too long.
    Surprisingly, the best place to take a nap may be a hammock(吊床)if you have one. A Swiss study【C18】______ last year found that people fell asleep faster and had deeper sleep when they napped in a hammock than in a bed. That same rocking【C19】______ that puts babies to sleep works【C20】______ for grownups, too.
【C14】
选项 A、of
B、beyond
C、during
D、for
答案D
解析 介词辨义。空格处位于名词短语several hours之前，根据选项可知，需填入介词。根据句意，下午1时至3时小憩一下可以提高警惕性______几个小时，由此可知，空格处介词表示一段时间。for后接一段时间，符合题意，故答案为D)。
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