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Surveys of American teenagers find that about half of them do not get enough
Surveys of American teenagers find that about half of them do not get enough
游客
2023-10-06
45
管理
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. [br]
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答案
less than
解析
根据上文讲到的青少年睡眠不足可以推断,他们的睡眠时间少于他们所需的时间。结合录音填入less than“少于”。
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