第3部分：概括大意与完成句子(第23～30题，每题1分，共8分)
下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第2～6段其中四段选择1个最佳标题;(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。
More Than 8 Hours Sleep Too Much of a Good Thing
Although the dangers of too little sleep are widely known, new research suggests that people who sleep too much may also suffer the consequences.
Investigators at the University of California in San Diego found that people who clock up 9 or 10 hours each weeknight appear to have more trouble falling and staying asleep，as well as a number of other sleep problems，than people who sleep 8 hours a night. People who slept only 7 hours each night also said they had more trouble falling asleep and feeling refreshed after a night’s sleep than 8-hour sleepers.
These findings, which Dr. Daniel Kripke reported in the journal Psychosomatic Medicine, demonstrate that people who want to get a good night’s rest may not need to set aside more than 8 hours a night. He added that “it might be a good idea” for people who sleep more than 8 hours each night to consider reducing the amount of time they spend in bed, but cautioned that more research is needed to confirm this.
Previous studies have shown the potential dangers of chronic shortages of sleep – for instance, one report demonstrated that people who habitually sleep less than 7 hours each night have a higher risk of dying within a fixed period than people who sleep more.
For the current report，Kripke reviewed the responses of 1,004 adults to sleep questionnaires, in which participants indicated how much they slept during the Week and whether they experienced any sleep problems. Sleep problems included waking in the middle of the night，arising early in the morning and being unable to fall back to sleep，and having fatigue interfere with day-to-day functioning.
Kripke found that people who slept between 9 and 10 hours each night were more likely to report experiencing each sleep problem than people who slept 8 hours. In an interview, Kripke noted that long sleepers may struggle to get rest at night simply because they spend too much time in bed. As evidence，he added that one way to help insomnia is to spend less time in bed. “It stands to reason that if a person spends too long a time in bed, then they’ll spend a higher percentage of time awake.” he said.
23. Paragraph 2 ________
24. Paragraph 4 ________
25. Paragraph 5 ________
26. Paragraph 6 ________
A. Keprike’s Research Tool
B. Dangers of Habitual Shortages of Sleep
C. Criticism on Kripke’s Report
D. A way of Overcoming Insomnia
E. Sleep Problems of Long and Short Sleepers
F. Classification of Sleep Problems
27. To get a good night’s rest，people may not need to ________.
28. Long sleepers are reported to be more likely to ________.
29. One of the sleep problems is waking in the middle of the night, unable to ________.
30. One survey showed that people who habitually ________ each night have a higher risk of dying.
A. fall asleep again .
B. become more energetic the following day
C. sleep less than 7 hours
D. confirm those serious consequences
E. suffer sleep problems
F. sleep more than 8 hours
第4部分：阅读理解(第31～45题，每题3分，共45分)
下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定1个最佳选项。
第一篇
Sugar Power for Cell Phones
Using enzymes commonly found in living cells, a new type of fuel cell produces small amounts of electricity from sugar. If the technology is able to succeed in mass production, you may some day share your sweet drinks with your cell phone.
In fuel cells, chemical reactions generate electrical currents. The process usually relies on precious metals, such as platinum. In living cells, enzymes perform a similar job, breaking down sugars to obtain electrons and produce energy.
When researchers previously used enzymes in fuel cells, they had trouble keeping them active, says Shelley D. Minteer of St Louis University. Whereas biological cells continually produce fresh enzymes, there’s no mechanism in fuel cells to replace enzymes as they quickly degrade.
Minteer and Tarnara Klotzbach, also of St Louis University, have now developed polymers that wrap around an enzyme and preserve it in a microscopic pocket. “We tailor these pockets to provide the ideal microenvironment for the enzyme, Minteer says. The polymers keep the enzyme active for months instead of days.
In the new fuel cell, tiny polymer bags of enzyme are embedded in a membrane that coats one of the electrodes. When glucose from a sugary liquid gets into a pocket, the enzyme oxidizes it, releasing electrons and protons. The electrons cross the membrane and enter a wire through which they travel to the other electrode, where they react with oxygen in the atmosphere to produce water. The flow of electrons through the wire constitutes an electrical current that can generate power.
So far, the new fuel cells don’t produce much power, but the fact that they work at all is exciting, says Paul Kenis, a chemical engineer at the University of Illinois at Urbana-Champaign. “Just getting it to work,” Kenis says, “is a major accomplishment.”
Sugar-eating fuel cells could be an efficient way to make electricity. Sugar is easy to find. And the new fuel cells that run on it are biodegradable, so the technology wouldn’t hurt the environment. The scientists are now trying to use different enzymes that will get more power from sugar. They predict that popular products may be using the new technology in as little as 3 years.
31. According to the first paragraph, when can we share our sweet drinks with our cell phones?
A. When enzymes can be commonly found in living cells.
B. When the technology of producing a new type of fuel cell appears.
C. When the technology of a newtype of fuel cell is suitable for mass production.
D. When the technology of mass producing cell phones appears.
32. What trouble did Minteer and Klotzbach have in their research?
A. They had trouble keeping enzymes in fuel cells active.
B. They had trouble keeping biological cells active.
C. They had trouble producing fresh enzymes.
D. They had trouble finding mechanism for producing enzymes.
33. According to Paragraph 5, electrons are released _____
A. when bags of enzyme are embedded in the new fuel cell.
B. when glucose from a sugary liquid goes through the enzyme.
C. when the enzyme oxidizes the glucose from a sugary liquid that goes through a pocket.
D. when the enzyme oxidizes the sugary liquid that goes through a pocket.
34. What is exciting about the new fuel cells?
A. Their limitless power generation capacity is amazing.
B. Their limited power generation capacity is a good beginning.
C. Their limited power generation capacity is the result of great efforts.
D. Their limitless power generation capacity is a major accomplishment.
35. According to the last paragraph, what is NOT true of the new fuel cells?
A. The new fuel cells run on sugar that is easy to find.
B. The new fuel cells are environment friendly.
C.The new fuel cells are biologically degradable.
D. It will take some time before the new fuel cells can be used in popular products.
