Question

A Brown University sleep researcher has some advice for people who run high schools: Don’t start classes so early in the morning. It may not be that the students who nod off at their desks are lazy. And it may not be that their parents have failed to enforce(确保) bedtime. Instead, it may be that biologically(生物学上)these sleepyhead(贪睡者)students aren’t used to the early hour.
　　“Maybe these kids are being asked to rise at the wrong time for their bodies,” says Mary Carskadon, a professor looking at problem of adolescent (青春期的)sleep at Brown’s School of Medicine.
　　Carskadon is trying to understand more about the effects of early school time in adolescents. And, at a more basic level, she and her team are trying to learn more about how the biological changes of adolescence affect sleep needs and patterns(方式).
　　Carskadon says her work suggests that adolescents may need more sleep than they did at childhood, no less, as commonly thought.
　　Sleep patterns change during adolescence, as any parent of an adolescent can prove. Most adolescents prefer to stay up later at night and sleep later in the morning. But it’s not just a matter of choice---their bodies are going through a change of sleep patterns.
　　All of this makes the transfer(迁移)from middle school to high school---which may start one hour earlier in the morning----all the more difficult, Carskadon says. With their increased need for sleep and their biological clocks set on the “sleep late, rise late” pattern, adolescents are up against difficulties when they try to be up by 5 or 6 a.m. for a 7:30 a.m. first bell. A short sleep on a desktop may be their body’s way of saying. “I need a timeout.”
【小题1】Carskadon suggests that high schools should not start classes so early in the morning because _______.

A．it is really tough for parents to enforce bedtime

B．it is biologically difficult for students to rise early

C．students work so late at night that they can’t get up early

D．students are so lazy that they don’t like to go to school early

【小题2】The underlined phrase nod off most probably means _______.

A．turn around

B．agree with others

C．fall asleep

D．refuse to work

【小题3】What might be a reason for the hard transfer from middle school to high school?

A．Adolescents depend more on their parents.

B．Adolescents have to choose their sleep patterns.

C．Adolescents sleep better than they did at childhood.

D．Adolescents need more sleep than they used to.

【小题4】What is the test mainly about?

A．Adolescent health care.

B．Problems in adolescent learning.

C．Adolescent sleep difficulties.

D．Changes in adolescent sleep needs and patterns.

Answer 1

【小题1】B
【小题2】C
【小题3】D
【小题4】D

解析试题分析：文章主要讲述了青春期需要睡眠时间的改变和睡眠模式方面的变化。
【小题1】细节题。从文章it may be that biologically(生物学上)these sleepyhead(贪睡者)students aren’t used to the early hour.可知起的太早在学生的生物学理上是很困难的，故选B
【小题2】推断题。从It may not be that the students who nod off at their desks are lazy. 可知说这些学生趴在桌子上，是懒惰的学生，所以应该是睡觉的意思，故选C
【小题3】细节题。从　Carskadon says her work suggests that adolescents may need more sleep than they did at childhood, no less, as commonly thought 可知青春期比以前需要更多的睡眠，故选D
【小题4】主旨题。文章主要讲述了青春期需要睡眠时间的改变和睡眠模式方面的变化，故选D
考点：健康类说明文
点评：文章主旨鲜明，题目设置多为细节题。对于细节题是很好解答的题目，而主旨题要在概括性的段落中寻找答案。细节题在文章题目中找到关键字在文章中找到对应的出处，再仔细对比得出正确的答案。