8．Growing up in a hard-working midwestern city，I quickly learned that sleep hour is the first thing I can sacrifice．When I was young，the men I adored and respected regularly ran on just five hours of sleep，which led me to view needing sleep as a sign of weakness．
The problem is，one less hour of sleep is not equal to an extra hour of achievement．In many cases the opposite occurs．When you lose an hour of sleep，it decreases your productivity，health，and ability to think the following day．The lack of sleep can lead to many other negative events．In addition to less achievement at work，you skip regular exercise，and eat poorly．
According to a survey from the National Sleep Foundation，roughly 70percent of those surveyed do not get enough sleep．Another influential study，conducted by Professor Anders Ericsson from University of Chicago，found that top performers sleep 8hours and 36minutes per day．The average American，for comparison，gets just 6hours and 51minutes of sleep．
People now realize the importance of eight hours of quality sleep．While getting this much quality sleep each night is easier said than done．There are a few tips to improve your night's sleep．What you do before bed matters most．More than 90percent of Americans admit to using smart phones in the hour before bed．This is an obvious problem in terms of allowing your mind to continue thinking actively．What you may not realize is that the light from mobile phones alone is a more direct threat to your sleep．So remember to keep away from all electronic devices in the hour before your bedtime．Creating the right environment in your bedroom can also help．It is easier to sleep in a room that is a few degrees cooler than the temperature you are accustomed to throughout the daytime．
Sacrificing sleep may no longer be a sign of strength．You will be more likely to get more work done when you put sleep first．Every hour of sleep is a wise investment（投资）-not an expense．
32．The lack of sleep has the flowing negative effects EXCEPTD．
A．affecting the ability to think
B．shortening the exercise time
C．decreasing achievement at work
D．causing addiction to electronic devices
33．What did the study done by National Sleep Foundation find？B
A．The better you are，the longer your sleep time is．
B．Only 30percent of those surveyed get enough sleep．
C．If you don't perform well at work，your sleep time will be reduced．
D．A man can't guarantee his productivity without eight hours of quality sleep．
34．What is the purpose of the text？A
A．Providing useful tips for quality sleep．
B．Introducing a new finding of a scientific study．
C．Correcting a wrong opinion about sleep and work．
D．Making known the difficulty of getting sound sleep．
35．What can be the best title for the text？C
A．Smart phone，a treat to sound sleep．
B．Sacrificing sleep，a sign of weakness．
C．Enough quality sleep，clever investment．
D．The more sound sleep，the less contribution．
分析 文章介绍了睡眠不足对身体的危害，并且提出了关于睡眠的建议，希望人们可以保证充足的睡眠．
解答 32．D．理解判断题．由第二段中In addition to less achievement at work，you skip regular exercise，and eat poorly．可知如果你睡眠不足，可能会导致一系列的不良后果．你的工作效率会下降，定期的体育锻炼也不再坚持，饮食也会一团糟，D选项没有提到，故选D．
33．B．细节理解题．由第三段中roughly 70percent of those surveyed do not get enough sleep．可知百分之七十的人睡眠不足，因此仅百分之三十的人有充足睡眠，故选B．
34．A．写作意图题．由文意可知，文章后面主要是提出了关于睡眠的建议，故选A．
35．C．选择题目题．由文意可知，文章介绍了睡眠不足的危害和提出了关于睡眠的建议，希望人们可以保证充足的睡眠，因此C选项符合题意，故选C．
点评 在做阅读理解时，考生可快速阅读短文，通读测试题，明确考察点，在对应细读，加快做题速度．有时间还可以复查校对答案．
