Scientists say they now have proof to support the old-fashioned advice that it's best to sleep on a problem. They say sleep strengthens the memory and helps the brain organize the masses of information we receive each day.

　　Lead researcher Bob Stickgold at the Harvard Medical School said, "Sleep helps us draw rules from our experiences. It's like knowing the difference between dogs and cats. even if it's hard to explain. "

　　The US research team studied how well students remembered connections between words and symbols (象征) , reports New Scientist. They compared how the students performed if they had had a sleep between seeing the words and having the test, and if they had not slept. They found that people were better able to remember lists of related words after a night' s sleep than after the same time spent awake during the day. They also found it easier to remember themes (主题) that the words had in common. But they forgot around one in four more themes if they had been awake. Prof. John Groeger, of Surrey University's Sleep Research Centre, said, "People have been trying for years to fard out what the purpose of sleep is, as we know that only certain parts of it have a restorative (有助恢复的) value. "

　　" We form and store huge numbers of experiences in the head every day, and sleep seems to be the way the brain deals with it all. "

　　48.The phrase" to sleep on a problem" in Paragraph 1 most likely means to______.

　　A.pay full attention to a problem

　　B.wait until later for a decision

　　C.sleep to forget a problem

　　D.have difficulty sleeping

　　49.In the study by the US research team, students were asked to______.

　　A.put together words of similar meanings

　　B.remember words and their meanings

　　C.show their knowledge of words

　　D.make up lists of related words

　　50.Which of the following may be easier to remember?

　　A.Themes learned right before the tes

　　B.Rules from personal experience

　　C.Words learnt before a good slee

　　D.Ideas stored together in the brai

　　51.What may be the importance of the research?

　　A.It shows sleep may help us manage imformatio

　　B.It helps find out the common themes of word

　　C.It tells us that more sleep can improve healt

　　D.It proves the value of old-fashioned advic

　　E

　　Email Announcement Weekly

　　University libraries to be closed for day on Friday

　　All university libraries will be closed from 8 a. m. to 1 p. m. on Friday (Aug.10). The closure will allow librarians to complete various tasks to prepare for the coming fall term. Library users are asked to change their study or research plans around this short closure.

　　Bring your old films to Home Movie Day

　　Find your old home movies and bring them to Home Movie Day from 1-5 p. m. Saturday (Aug.11). The free event at Will' s Campbell Hall, 300 N. Goodwin, includes a clinic on caring for old films. and continuous showing of movies brought in by students like you. Sponsors (主办者) are WILL and the U of C Library.

　　Ireland garden tour set for June 2008

　　The public is invited to join Illinois Master Gardeners on a trip to visit popular public gardens and castles in Ireland. The tour (June 2-12, 2008) also includes several personal gardens as well as free time to find more. Bookings due Sept. 15. For trip introduction and booking information. please visit travels. uiui. edu/mgl.

　　52.To whomis the first email announcement probably sent?

　　A.International tourist

　　B.University peopl

　　C.The general publi

　　D.Movie lover

　　53.What do people do on Home Movie Day?

　　A.They watch old movies at hom

　　B.They give away old movies for fre

　　C.They share home movies with other

　　D.They show movies at the U of C librar

　　54.People need to book the Ireland trip______.

　　A.by Sep 15, 2007

　　B.on Sep 15, 2007

　　C.between June 2-12, 2008"

　　D.after June 12, 2008

　　55.What can people do at Campbell Hall?

　　A.Learn how ωtake care of old movie

　　B.Visit a clinic to get advice on healt

　　C.Get information for free even

　　D.Plan their study and researc