Surveys of American teenagers find that about half of them do not get enough sleep on school nights. They get an average of sixt

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问题     Surveys of American teenagers find that about half of them do not get enough sleep on school nights. They get an average of sixty to ninety minutes【11】experts say they need.
    One reason for this deficit is biology. Experts say teens are biologically【12】to go to sleep later and wake up later than other age groups. Yet many schools start classes【13】seven in the morning.
    As a result, many students go to class【14】like sixteen-year-old Danny. He plays two sports, lacrosse and football. He is an【15】teen—except in the morning.
  

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答案feeling

解析 上句讲到许多学校七点就开始上课了,本句讲由此造成的结果,许多学生的感觉就像16岁的:Danny一样。结合录音填入feeling。本句谓语动词是go,feel like是伴随状语,feel需要用现在分词形式。
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