单选题Passage Two Questions 30 to 32 are bused on the passage you have just heard.
单选题
A. They might have problems with clear thinking. B. They might become angry easily. C. They might have trouble controlling their emotions. D. They might become overweight.
【正确答案】
D
【答案解析】[解析] 30-32 Now, health officials have begun a campaign to urge children to get enough sleep. The officials say children need at least nine hours of sleep every night. (30)They say research shows that children who get this much sleep perform better in school, suffer fewer accidents and are less likely to become too fat. Studies show that lack of sleep causes tiredness and problems with clear thinking. People who do not get enough sleep become angry easily and have trouble controlling their emotions. Among children, problems that result from lack of sleep often are mistaken for more serious disorders. (31)Unlike adults, tired children seem to have endless energy. Some doctors mistakenly identify this as hyperactivity. Experts say many American teenagers are not getting enough sleep. Many high school students in the United States start school very early in the morning. A University of Minnesota study found that attendance at the high schools improved after the starting time was changed. However, the later start did not greatly affect the performance of the students. The American Academy of Pediatrics represents doctors who treat children. (32)It notes that many sleep disorders first develop in childhood. It says doctors often do not identify the disorder until years later. The group has agreed to join in a study with the National Center on Sleep Disorders Research. During the next five years, they plan to examine sleep problems in very young and older children. They also will develop guides for doctors to use when testing for sleep problems. And they will provide educational materials about the importance of healthy sleep. Q: According to the studies, what might happen to the children who is lack of sleep?
[听前预测] 很明显此题属推测题，且angry become overweight, have trouble, have problems with都提到了不好的状态，应该考查做某事所带来的后果。 [答案解析] 研究表明睡眠充足的孩子在学校表现好，很少发生事故，不容易发胖。因此推断睡眠少的孩子可能容易发胖。故选D)项。
单选题
A. They do not perform well at school. B. They look more tired. C. They look very energetic. D. They are easily angry.
【正确答案】
C
【答案解析】[解析] Q: What might make doctors diagnose children's lack of sleep mistakenly?
单选题
A. The studies might be helpful to prevent adults from sleeping problems. B. The studies might offer guides for doctors to use when testing for sleep problems. C. The studies might be helpful to make children energetic again. D. The studies might provide materials on how to stay healthy.
【正确答案】
B
【答案解析】[解析] Q: What can be learnt from the studies of the American Academy of Pediatrics on children's sleep disorders?
[听前预测] 由选项be helpful to, offer guide for, provide materials on可推测，此题是一个关于研究作用的推测题。 [答案解析] 讲话人提到美国儿科学会发现很多睡眠障碍问题在童年时期就出现了，但却需要很多年才能发现。因此对儿童睡眠问题的研究可能为医生检测睡眠问题给予指导，故选A)项。