根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。

      Secret codes (密码)keep messages private。Banks, companies, and government agencies use secret codes in doing business, especially when information is sent by computer.

     People have used secret codes for thousands of years. {#blank#}1{#/blank#}  Code breaking never lags(落后) far behind code making. The science of creating and reading coded messages is called cryptography.

     There are threemain types of cryptography. {#blank#}2{#/blank#}  For example, the first letters of “My elephant eats too many eels” Spell out the hidden message “Meet me.”

{#blank#}3{#/blank#} You might represent each letter with a number, For example, Let's number the letters of the alphabet, in order, from 1 to 26. If we substitute a number for each letter, the message “Meet me” would read “13 5 20 13 5.”

     A code uses symbols to replace words, phrases, or sentences. To read the message of a real code, you must have a code book. {#blank#}4{#/blank#} For example “bridge“ might stand for “meet” and “out” might stand for “me.” The message “bridge out” would actually mean “Meet me.” {#blank#}5{#/blank#}  However, it is also hard to keep a code book secret for long. So codes must be changed frequently.

A. It is very hard to break a code without the code book.
B. In any language, some letters are used more than others.
C. Only people who know the keyword can read the message.
D. As long as there have been codes, people have tried to break them.
E. You can hide a message by having the first letters of each word spell it out.
F. With a code book, you might write down words that would stand for other words.
G. Another way to hide a message is to use symbols to stand for specific letters of the alphabet.

Absence   

    If a student is absent, parents are asked to contact the school and report that absence. Simply ring the school and you will be directed to the absence phone system. You should then give the name of the student and their tutor teacher.

Attendance

    School hours are 08:35 to 15:00. If a student is late, they must sign in at the Student Office.

    School times are as follows: Monday, Tuesday, Thursday and Friday.

08:35 - 09:35  Period 1

09:35 - 10:35  Period 2

10:35 - 10:50  Tutor Time

10:50 - 11:10  Interval

11:10 - 12:05  Period 3

12:05 - 13:00  Period 4

13:00 - 13.45  Lunch

13:45 - 14:05  School-wide reading

14:05 - 15:00  Period 5

Wednesday Only

09:00 - 09:55  Period 1

09:55 - 10:50  Period 2

Rest of the times are the same as for the other days.

Cellphones

    The current cell phone policy is that, although permitted at school, they must not be used or turned on during class time.

    John J. Lennon, who's currently serving a 28-year life sentence for drug dealing and a murder he committed in 2001. He is one of 23 out of 2,300 inmates(监犯)participating in an education program, and he advocates greater access to education in prison through TV. Currently, he says the TV is used as “an inability tool; it's a tool to keep us entertained cells.” But he suggests that prison TVs should stream online courses instead of movies.

    “If inmates had the chance to watch an online course then they might say, ‘Hey, look what's on Channel 3; it's an interesting lecture from a professor of philosophy.' Believe it or not, people will tune in, and after the lecture they're going to go on their gates, hang on their bars, and they're going to talk about it.”

    Education, he says, also makes prison a safer place. “If I'm working on a paper banging away(砰砰响个不停)on my typewriter, I have other things on my mind. I'm not fighting in the prison yard.” Most prison administrators support that view. “They understand it makes prison a safer place if you have a group of guys with their eyes on the prize who are trying to change themselves.”

    John J. Lennon arrived at Attica in 2004 with a 9th grade education, but in May will graduate with a two-year associate degree. Attica creative writing workshops have changed his life.

    “I came into prison looking up to gangsters(匪徒), now I look up to scholars and intellectuals like Doran Larson, Tim Golden, all these Pulitzer-winning journalists. Education has changed the lens(镜头)through which I view the world. I don't look up to gangsters anymore. I think it's a horrible lifestyle.”

    Hamilton College professor Doran Larson has been teaching creative writing workshops at Attica since 2006. He says the demand for education from inmates is enormous and that it's “almost impossible to create a program large enough to satisfy the desire which pushes against the public perception(认识)that such people inside aren't interested in education.”

    Thoughts on prison education have changed over the years. Until 1973, there was a period of rehabilitation(改造)in American prisons. Even after that year, college degree programs were available for inmates nationwide until 1994, when the country's movement to get tough on crime made prisoners not qualified for Pell fund aid. “We have moved to a punishment mentality(心态),” Larson says. No one cared about these people “as long as they are kept from the outside.”

    Larson argues that inmates want to become productive members of society. The prison population is “a huge untapped resource, both commercial and intellectual. And right now there is far from enough being done to tap into skills which can get them off the public dole(失业救济金)and turn them into taxpayers.”

    Recently a new study has been carried out. It shows students who write notes by hand during lectures perform better on exams than those who use laptops.

    Students are increasingly using laptops for note-taking because of speed and legibility (清晰度). But the research has found laptop users are less able to remember and apply the concepts they have been taught.

    Researchers performed experiments that aimed to find out whether using a laptop increased the tendency to make notes “mindlessly” by taking down word for word what the professors said.

    In the first experiment, students were given either a laptop or pen and paper. They listened to the same lectures and were told to use their usual note-taking skills. Thirty minutes after the talk, they were examined on their ability to remember facts and on how well they understood concepts.

    The researchers found that laptop users took twice as many notes as those who wrote by hand. However, the typists performed worse at remembering and applying the concepts. Both groups scored similarly when it came to memorizing facts.

    The researchers' report said, “While more notes are beneficial, if the notes are taken mindlessly, as is more likely the case on a laptop, the benefit disappears.”

    In another experiment aimed at testing long-term memory, students took notes as before but were tested a week after the lecture. This time, the students who wrote notes by hand performed significantly better on the exam.

    These two experiments suggest that handwritten notes are not only better for immediate learning and understanding, but that they also lead to superior revision in the future.

    Have you ever found yourself in this situation: You hear a song you used to sing when you were a child – a bit of nostalgia(怀旧) or "blast from the past," as we say. But it is not a distant childhood memory. The words come back to you as clearly as when you sang them all those years ago.

    Researchers at the University of Edinburgh studied the relationship between music and remembering a foreign language. They found that remembering words in a song was the best way to remember even one of the most difficult languages.

    Here is what they did. Researchers took 60 adults and randomly divided them into three groups of 20. Then they gave the groups three different types of "listen-and-repeat" learning conditions. Researchers had one group simply speak the words. They had the second group speak the words to a rhythm, or beat. And they asked the third group to sing the words.

    All three groups studied words from the Hungarian language for 15 minutes. Then they took part in a series of language tests to see what they remembered.

    Why Hungarian, you ask? Researchers said they chose Hungarian because not many people know the language. It does not share any roots with Germanic or Romance languages, such as Italian or Spanish. After the tests were over, the singers came out on top. The people who learned these new Hungarian words by singing them showed a higher overall performance. They did the best in four out of five of the tests. They also performed two times better than those who simply learned the words by speaking them.

    Dr. Katie Overy says singing could lead to new ways to learn a foreign language. The brain likes to remember things when they are contained in a catchy 3, or memorable 4, tune 5.

    Dr. Ludke said the findings could help those who struggle to learn foreign languages. On the University of Edinburgh's website Dr. Ludke writes, "This study provides the first experimental evidence that a listen-and-repeat singing method can support foreign language learning, and opens the door for future research in this area."

    When Oliver Sacks, 82, died on Aug 30 at his home in New York City, the world was saddened by the loss of a brilliant neurologist (神经学者)and a truly beautiful mind.

     London-born Sacks was most famous for his writing. A Forbes obituary (讣告)calls him "one of the greatest writers of science of the past 50 years. Maybe the greatest".

    In his best-selling 1985 book The Man Who Mistook His Wife far a Hat, Sacks described man who could not tell the difference between his wife's face and his hat, because his brain had difficulty telling what he saw.

    In 2006, Discover magazine ranked it among the 25 greatest science books of all time, declaring, "Lots of neuroscientists now looking into the mysteries of the human brain cite (列举)this book as their greatest inspiration."

     His 1973 book. Awakenings, is about a group of patients who were frozen in a decades-long sleep until Sacks tried a new treatment The book led to a 1990 movie in which Sacks by Robin Williams. It was nominated (提名)for Academy Awards.

    Another book. An Anthropologist on Man、published in 1995, described cases like that of a painter who lost his color vision in a car accident but found new creative power in black-and-white images. Sacks also wrote the story of 50-year-old man who suddenly regained sight after nearly a lifetime of blindness. The experience was a disaster. The man's brain could not make sense of the visual world. After a full and rich life as a blind person, he became "a very disabled and miserable (悲惨的）sighted man," Sacks wrote. "When he went blind again, he was rather glad of it."

    Despite the drama and unusual stories. Sacks' books were not meant to be freak shows. "Oliver Sacks humanizes illness…he writes of body and mind, and from every one of his case studies there shows a feeling of respect for the patient and for the illness," Roald Hoffinann, a Nobel Prize-winning chemist, said in 2001.

     When Sacks received the Lewis Thomas Prize for science writing in 2002, the citation (荣誉状)declare, "presses us to follow him into unknown areas of human experience and forces us to realize, once there, that we are facing only oureclves."