Question

No one knows why we sleep,but it’s certain that we need to.People who are prevented from sleeping begin to suffer obvious effects after a few days—they think less clearly,and they fall asleep during the working hours;some may have hallucinations（幻觉）.

    There are no rules about sleep.Generally speaking,grown-ups sleep about 7 and half hours each night and probably more than 60 percent get between seven and eight hours.But perhaps eight percent are quite happy with 5 hours or lees,and four percent or so find that they want ten hours or more.If you feel all right,you’re probably getting enough sleep.The important thing is not to worry how much other people get—their needs may be different.Exercise doesn’t seem to need to increase the sleep time—office workers,for example,sleep for about as long as people doing physically active work.

    Children sleep more than grown-ups---perhaps 14 to 18 hours soon after birth,going down to grow-up levels by early teenage.Sleep patterns also tend to be different in the elderly,who may sleep less at night than they did when younger,find sleep getting more broken,and often make it a rule to sleep during the daytime.

1.According to the passage,some people are unable to think clearly because        .

A. they have hallucinations    B. they feel sleepy during the working hours

C. they don’t have enough sleep    D. they are certain to be kept from going to bed

2.Which of the following is true?

A. All grown-ups must have at least eight-hour sleep    B. Most of grown-ups sleep for seven or eight hours

C. Quite a few people need only 5 hours or less for them sleep    D. No grown-ups sleep more than ten hours

3.Whether you have got enough steep is judged by        .

A. how may hours you have slept    B. How may hours you need to sleep

C. Whether you do exercise and physical work    D. Whether you feel fresh and energetic

4.According to the passage a boy of 14 years old sleeps        .

A. as long hours as a grown-up    B. much longer hours than grown-up

C. for 14 hours each night    D. for less than 8 hours per night

Answer

1.C

2.B

3.D

4.A

【解析】睡眠对我们是非常重要的，睡眠不足会带来很多的问题，文章就不同的年龄阶段的睡眠时间和模式进行说明。

1.细节理解题。从文章第一段的句子：People who are prevented from sleeping begin to suffer obvious effects after a few days—they think less clearly, and they fall asleep during the working hours; some may have hallucinations(幻觉).可知一些人不能清楚地思考是因为没有足够的睡眠，选C。

2.细节理解题。从文章第二段的句子：There are no rules about sleep. Generally speaking, grown-ups sleep about 7 and a half hours each night and probably more than 60 percent get between seven and eight hours.可知大部分成年人的睡眠是7到8小时，选B。

3.细节理解题。从文章第二段的句子：If you feel all right, you’re probably getting enough sleep.可知是否有足够的睡眠是通过是否恢复体力，精力充沛判断的，选D。

4.推理理解题。从文章第三段的句子：Children sleep more than grown-ups—perhaps 14 to 18 hours soon after birth, going down to grown-up levels by early teenage. early teenage.指的是13-15岁之间，故一个14岁的男孩睡的时间和成年人一样长。选A。

【名师点睛】

关于细节理解题

用细节定位法：细节理解题属直接解答性问题，是阅读理解题中最简单的一种，多数属中低难度的送分题。但由于高考所占的比例很大，应特别引起注意。事实和细节题的命题特点是：把某词语、某个句子或某具体事实用不同于原文的另一方式或句型表达，即同义改写。

比如文章第1题，According to the passage,some people are unable to think clearly because-----根据文章，一些人不能清楚地思考是因为----。就需要快速定位在文章的第一段的句子：People who are prevented from sleeping begin to suffer obvious effects after a few days—they think less clearly, and they fall asleep during the working hours; some may have hallucinations(幻觉).。几天之后，那些被阻止睡觉（睡眠不好）的人开始遭受明显的影响---他们思考问题不清楚，工作时间睡觉，一些可能会出现幻觉。可看出答案C. they don’t have enough sleep是对文章此处内容的改写，故选C。