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As the school year kicks off, parents are once again struggling to cajole (哄骗) and, if need be, drag their exhausted teens out of bed. That image may make you laugh, but lack of sleep is no joke. (77) Teenagers who don’t get enough rest have more learning, health, behavior and mood problems than students who get at least nine hours a night. Long-term lack of sleep is tied to heart disease, overweight, depression and a shortened life span in adults, indicating the importance of establishing good sleep habits early in life. Lack of sleep can be especially deadly for teens; car accidents are the leading cause of death among teenagers, and safety experts believe sleepy driving is a major factor.
Unfortunately, few teenagers get the sleep they need. In a survey of middle-school and high-school students, University of Colorado researchers found that 82 percent said they woke up tied and unrefreshed, and more than half had trouble concentrating during the day at lea
A. Multitasking
B. Striking a balance between
C. Weekend catch-up sleep
D. Healthy diet

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As the school year kicks off, parents are once again struggling to cajole (哄骗) and, if need be, drag their exhausted teens out of bed. That image may make you laugh, but lack of sleep is no joke. (77) Teenagers who don’t get enough rest have more learning, health, behavior and mood problems than students who get at least nine hours a night. Long-term lack of sleep is tied to heart disease, overweight, depression and a shortened life span in adults, indicating the importance of establishing good sleep habits early in life. Lack of sleep can be especially deadly for teens; car accidents are the leading cause of death among teenagers, and safety experts believe sleepy driving is a major factor.
Unfortunately, few teenagers get the sleep they need. In a survey of middle-school and high-school students, University of Colorado researchers found that 82 percent said they woke up tied and unrefreshed, and more than half had trouble concentrating during the day at lea
A. heart disease
B. car accidents
C. skin problems
D. poor concentration

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[填空题]The date of our______(arrive)is postponed once again for the thunderstorm has blocked the air traffic since Wednesday．

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{{B}}TEXT A{{/B}}

American’s life has once again been greatly changed by the new age of science and technology since the Second World War. Everything has speeded up to a tremendous rate. Information is immediate, nobody has to wait to hear any news. There is a television set in every house. There is instant printing which has changed the way that offices and the universities run.
But perhaps the biggest change is the telephone. People no longer write letters to one another. They pick up the telephone. Every house has at least two, sometimes three, four and five telephones. Every office bas many telephones. It speeds things up. And its cost is not much.
Perhaps the biggest difference is in the growth of computers. Computers can think, can remember, can calculate faster than any human brain. A computer can hold more than a million facts in its memory. There are computers that are so big they would fill this entire au
A. its electronic technology
B. people’s way of living
C. wide use of television
D. its rapidness and efficiency in doing things

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Medicine Award Kicks off Nobel Prize Announcements

Two scientists who have won praise for research into the growth of cancer cells could be candidates for the Nobel Prize in medicine when the 2008 winners are presented on Monday, kicking off six days of Nobel announcements.
Australian-born U. S. citizen Elizabeth Blackburn and American Carol Greider have already won a series of medical honors for their enzyme research and experts say they could be among the front-runners for a Nobel.
Only seven women have won the medicine prize since the first Nobel Prizes were handed out in 1901. The last female winner was U. S. researcher Linda Buck in 2004, who shared the prize with Richard Axel.
Among the pair’s possible rivals are Frenchman Pierre Chambon and Americans Ronald Evans and Elwood Jensen, who opened up the field of studying proteins called nuclear hormone receptors.
As usual, the award committee is giving no hints abou
A. He was from Sweden.
B. He was the inventor of dynamite.
C. He established the prizes in his will.
D. He gave clear instructions on how to select winners.

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