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高考英语阅读理解专项训练（04）A
It is not unusual to see your desk-mate yawn (打呵欠) as he complains that he didn\'t have a good sleep the night before. Many teens don\'t get enough sleep because they have too much homework, which keeps them up at night. Some teens cannot sleep at night even when they want to.
Studies show that during your teenage years, the body\'s biological clock is reset, telling you to sleep later at night and wake up later in the morning.
It is not unusual to see your desk-mate yawn (打呵欠) as he complains that he didn\'t have a good sleep the night before. Many teens don\'t get enough sleep because they have too much homework, which keeps them up at night. Some teens cannot sleep at night even when they want to.
Studies show that during your teenage years, the body\'s biological clock is reset, telling you to sleep later at night and wake up later in the morning.
