第三部分：阅读理解（共15小题；每小题2分，满分30分）
请认真阅读下列短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
If you see a student napping (打瞌睡) in the library, don't roll your eyes. New research from the University of California, Berkeley, shows that an hour's nap can considerably improve and restore your brain power. Indeed, the findings suggest that a nap not only refreshes the mind, but can make you smarter.
"Sleep not only rights the wrong of extended wakefulness but it moves you beyond where you were before you took a nap." said Matthew Walker, an assistant professor of psychology at UC Berkeley and the lead investigator of UC Berkeley sleep studies.
The latest study suggests that the brain may need sleep to process short-term memories, creating "space" for new facts to be learned. In their experiment, 39 healthy adults were given a hard learning task in the morning~~with broadly similar results, before half of them were sent for their nap. When the tests were repeated, the nappers improved their scores by 10 percent on average after sleeping; the scores of those who didn't nap actually dropped by 10 percent.
The results support previous data from the same research team that staying up all night―a common practice at college during midterms and finals―decreases the ability to memorize new facts by nearly 40 percent, due to a shutdown of brain regions for lack of sleep, said Walker.
"Sleep is needed to clear the brain's short-term memory storage and make room for new information." said Walker. "It's as though the e-mail inbox in your brain is full and, until you sleep and clear out those e-mails, you're not going to receive any more mail."
However, Professor Derk Jan Dijk, the director of the Surrey Sleep Research Centre, said that there was no clear evidence that daytime napping offered a distinct advantage over sleeping soundly just once over 24 hours.
"The sleep-wake cycle is not as fixed as we might think―we have the capability to sleep in different ways, "said Professor Derk Jan Djjk.
"The size of these effects is much more difficult to judge―if I have to learn something, for example, it's easier to do this when I'm feeling awake and ready than when I'm sleepy." he added.
56.According to UC Berkeley's new findings, the benefit of a nap is that   .
A.it helps to fix a napper's sleep-wake cycle
B.it makes hard learning tasks not difficult any more
C.it allows the brain to make room for new learning
D.it gives nappers chances to clear out their memory storage
57.Matthew Walker's study shows that___________.
A.learning ability in the morning is usually higher than that in the afternoon
B.extra working hours before an exam can make up for the lack of daily efforts
C.the size of the effects of napping depends on when it is taken
D.staying up late before an exam does not necessarily improve students' exam performance
58.The two research teams mentioned in the text may both agree that_____________      .
A.people's sleep-wake cycle decides the length of midday nap
B.sufficient sleep betters people's learning performance
C.scientific experiments are undependable as the results are often hard to judge
D.the differences in their findings result from different methods applied
59.What can we learn from this passage?
A.Rolling your eyes can stop you from napping.
B.Some people might move themselves when sleeping.
C.College students tend to study late into night before important exams.
D.Sleeping once over 24 hours is much better than daytime napping.