Question

There are new findings that not enough sleep may cause people to gain weight. Researchers say a lack of sleep can produce hormonal(激素的) changes that increase feelings of hunger.
In one study, researchers in the United States examined information on more than 1000 people. The people had taken part in a long-term study of sleep disorders.
Some people slept less than five hours a night. They had 15 percent higher blood levels of a hormone called ghrelin than people who slept eight hours. And they had 15 percent less of the hormone leptin. Experts say ghrelin helps make people feel hungry; leptin makes you feel full.
The scientists say these hormonal changes may be a cause of obesity in Western societies. They note the combination that sleep limitation is common and food is widely available.
The results were not affected by how much people exercised. People who are awake longer have more time to burn energy. But the researchers say loss of sleep may increase hunger especially for high-calorie foods, so people gain weight. It seems that, for survival, the body may be designed to store more fat during times with less sleep.
Researchers from Stanford University in California and the University of Wisconsin did the study. They found that the best amount of sleep for weight control is 7.7 hours a night.
The Public Library of Science published the findings in its journal Medicine . Internet users can read the full study, free of charge, at plos. org.
【小题1】Not enough sleep can cause obesity by ______.

A．burning more of your energy

B．making you want to eat more food

C．keeping you from doing exercise

D．helping you feel great without food

【小题2】Which would be a point supported by the reported findings?
The more you sleep, the farther away you are from obesity.
Those who don’t sleep at all are the most likely to put on weight.
Sleeping contributes more to obesity than eating.
It’s not wise to use sleep hours for exercise.
【小题3】When you sleep 7.7 hours a night, you will ______ .
have your ghrelin level rise and leptin level drop
have your leptin level rise and ghrelin level drop
have your ghretin and leptin levels properly balanced
have your hunger increase and your weight decrease
【小题4】The writer wrote this passage to _______ .

A．make a news report

B．offer a piece of medical advice

C．make an advertisement

D．keep a record of the old findings

【小题5】You can read the findings________.

A．Only on the Internet

B．only in Medicine

C．Both on the Internet and in Medicine

D．Neither on the Internet nor in Medicine

Answer 1

【小题1】B
【小题2】D
【小题3】C
【小题4】A
【小题5】C

解析试题分析：
【小题1】B 推理题。根据文章第一段第二行Researchers say a lack of sleep can produce hormonal(激素的) changes that increase feelings of hunger说明缺少睡眠会让人感觉饿，会增加人的食欲。故B正确。
【小题2】D 细节题。根据第五段2,3行People who are awake longer have more time to burn energy. But the researchers say loss of sleep may increase hunger especially for high-calorie foods, so people gain weight.说明把睡眠的时间拿来锻炼并不是好主意，因为睡眠少会让人发胖。
【小题3】C 细节题。根据文章倒数第二段They found that the best amount of sleep for weight control is 7.7 hours a night.说明7.7个小时的睡眠是最好的，即这种睡眠可以让你有恰当的荷尔蒙的分泌。故C正确。
【小题4】A 推理题。根据文章最后一段The Public Library of Science published the findings in its journal Medicine . Internet users can read the full study, free of charge, at plos. org.说明这是一份新闻报告。故A正确。
【小题5】C推理题。根据文章最后一段The Public Library of Science published the findings in its journal Medicine . Internet users can read the full study, free of charge, at plos. org.说明在journal Medicine和网站上都可以看到这篇文章。故C正确。
考点：考查新闻报告类短文阅读
点评：本文是一篇关于睡眠不足引起人的健康问题的新闻报告。集中考查了推理题，难度较大，要求考生在认真审题的基础之上进行合理的推理。尤其是57,58两题。