Napping(小睡) after learning something new could help improve your memory--- as long as you dream, scientists say.
They found people who dream about a new task do it better on waking than those who do not sleep or do not dream.
Volunteers were asked to learn the layout(布局，设计) of a 3D computer maze(迷宫) so they could find their way several hours later. Those allowed to take a pap and who also remembered dreaming of the task, found their way to a landmark quicker.
The researchers think the dreams are a sign that unconscious(无意识的) parts of the brain are working hard to process information about the task..
Dr. Robert Stickgold of Harvard Medical School, said dreams may be a marker that the brain is working on the same problem at many levels.
Study tips
Co-author Dr. Erin Wamsley said the study suggests our non-conscious brain works on the things that it deem(认为) are the most important.
“Every day we are gathering lots of information and new experiences,” she said. “It would seem that our dreams are asking the question, “How do I use this information to inform(影响) my life?”
The scientists say there may be ways to use this phenomenon(现象) for improving learning and memory. For example, students might be better studying hard before bedtime, or taking a nap after a period of afternoon study.
【小题1】 Scientists say ______ could help improve your memory.

Good morning，boys and girls．Today I'll talk about going online．

We know that there are too many net bars around us．The Internet can make our lives interesting and enjoyable．Many of us like going online very much because we can learn how to use the computer and can get more information from the Internet．We can learn English．We can read some good newspapers and magazines．It can make us clever in playing computer games．We can send e-mails to our friends quickly．We can chat freely online with our friends．It can help us to get in touch with people from all over the world．

But every coin has two sides．Net bars also bring us a lot of trouble．For example，some students spend too much time in playing compute games and some stay in the net bars all day and all night．Some girls even get to have boyfriends or some boys get to have girlfriends online．They write too many letters to each other．It takes them too much time to chat online，so they do worse and worse in their lessons and they don't study well any more．I think we mustn't get online when it is time for us to study．We can do it in summer or winter holidays or at the weekend．

At the same time，if we have lots of free time，we can do some out-of-class activities at school．We usually have activities from 4：50 to 5：50 in the afternoon．We can play basketball or football on Monday or Thursday afternoon．We can join some interests groups in school，such as drawing or reading on Tuesday afternoon，or singing and dancing on Wednesday afternoon．we can go to the English Corner on Friday afternoon．We hope we can spend more time on our subjects or on such activities．

1．Many of us like going online because it can help us                    ．

A．learn English and send e-mails            B．get more information

C．play computer games                          D．all of the above

2．According to the speaker，in our spare time we should                     ．

A．go online for longer time

B．stay in the classroom doing more exercises

C．go to the English Corner every afternoon

D．do more out-of-class activities at school

3．If you are free on Tuesday afternoon，what out-of-class activities can you have at school?

A．Playing basketball or football．                 B．Singing and dancing．

C．Drawing or reading．                                 D．Going to the English Corner．