经常熬夜会缩短寿命
A study says that going to bed late may be bad for us. It could shorten our life. The study was done in the UK. Researchers spent six-and-a-half years looking at 430,000 adults between the ages of 38 and 73. The researchers compared the deaths of people who went to bed early with those who went to bed late. Night owls (people who go to bed late) were 10 percent more likely to die during the period of the study. The researchers said that night owls were at a higher risk of poor health or an early death compared to early birds (people who sleep and wake up early).
The researchers said society and working patterns should change to reduce the risks for night owls. Researcher Malcolm Van Schantz said, “This is a public health issue that can no longer be ignored.” He suggested that night owls should be allowed to start and finish work later in the day so that they could sleep longer in the morning. He said night owls were more likely to suffer from mental problems, diabetes, and stomach and breathing problems. They were also more likely to smoke, drink alcohol and coffee, and take drugs. Researchers also said different sleeping patterns at weekends could increase the chances of health problems for night owls.
1.How long did it take researchers to do the study?
A 6 years.
B 6.5 years.
C 7 years.
D 7.5 years.
解析：选B。B 细节理解题。根据第一段第三句Researchers spent six-and-a-half years looking at 430,000 adults between the ages of 38 and 73. 可知研究者们花了六年半的时间研究38岁和73岁的成人，故选B。
2.Who are at a higher risk of poor death?
A Night owls.
B Early birds.
C People who go to bed early.
D People who wake up early.
解析：选A。A 细节理解题。根据第二段倒数第三句He said night owls were more likely to suffer from mental problems, diabetes and breathing problems.可知夜猫子更容易患精神类疾病，故选A。
3.What did Malcolm Van Schantz suggest?
A People should start work late at night.
B People should stop working in the day.
C Night owls should sleep longer in the morning.
D Night owls start and finish work early in the day.
解析：选C。C 细节理解题。根据二段的He suggested that night owls should be allowed to start and finish work later in the day so that they could sleep longer in the morning，可知他建议“夜猫子们”早上可以睡久一点，故选C。
4.Which of the following persons couldn’t be a night owl?
A A smoker with breathing problems.
B An alcoholic(酗酒者) with stomach troubles.
C A man who sleeps and wakes up early.
D A drug taker with mental problems.
解析：选C。C 推理判断题。根据第二段倒数第二三句可知，研究者们认为，“夜猫子”更容易出现精神问题、患糖尿病、胃病和呼吸问题，并且他们也更有可能吸烟、酗酒、喝咖啡和吸毒，四个选项中只有C项（早起早睡的人）可能不是“夜猫子”。故选C。
5.What’s the best title for the passage?
A Staying Up Late May Shorten Our Life.
B A Public Health Issue.
C Night Owls and Early Birds.
D Different Sleeping Patterns.
解析：选A。A 主旨大意题。根据全文内容来看，这篇文章主要介绍的是熬夜的危害，熬夜可能会缩短我们的生命，故选A。