If you and your friends wish to share a secret, you can write it in code, and no one else will be able to read it. Codes are one way of writing in secret Ciphers(暗码)are another. In a code each word is written as a secret code word or a code number. In a cipher each letter is changed.
Codes and ciphers have played an important role in the history of the world. Julius Caesar, the Roman ruler who defeated almost all the countries in Europe about 2,000 years ago, used a cipher when he sent secret messages to his troops. During the American Revolution, George Washington’s spies used a kind of code to send his information about the enemy before his military action. In World War Ⅱ. the Americans ”broke” or figured out Japan’s most important navy codes and got enough information to destroy a powerful Japanese fleet.
Storekeepers use codes to mark their goods. The codes show how much is paid for the goods or when they are added to the stock. Businessmen use codes to hide plans from their business enemies. Sometimes personal letters or diaries are written in code. Many people enjoy figuring out codes and ciphers simply as a hobby.
In the 16th century, codes and ciphers Were very popular among scientists. They wrote messages to each other in code so that no one else would learn their secrets. Geronimo Gardano, all Italian astrologer(占星家), mathematician, and doctor, invented the trellis cipher.
He took two sheets of paper and cut exactly the same holes in each one. Then he sent one sheet, which he called a trellis, to a friend and kept the other for himself. Whenever he wanted to write a message. he put his trellis over a clean sheet of paper and wrote the secret message through the holes. There he removed the trellis and filled the rest of the paper with words that would make sense. When his friend received it, he put his trellis over the writing and read the secret message.The best title of this passage would be _______.
| A．Codes and Ciphers |
| B．Differences between Codes and Ciphers |
| C．History of Codes and Ciphers |
| D．Inventors of Codes and Ciphers |
Which of the following statements is TRUE?
| A．Ciphers can be broken or figured out more easily than codes. |
| B．You could read some words in Geronimo’s letter without his trellis. |
| C．The first person who ever used a cipher in history was Julius Caesar. |
| D．Fondness of using codes was the hobby of the scientists in the 1600s. |
According to Geronimo Gardano, a trellis is _____________.
| A．a piece of paper with many small holes |
| B．a secret message with a lot of small holes |
| C．a letter with unreadable words and sentences |
| D．a sheet of paper with groups of Arabic figures |
It is NOT mentioned in the passage that codes and ciphers are used for the purpose of _________.
| A．military affairs | B．commercial secrets |
| C．scientific achievements | D．personal enjoyment |
The rapid growth of cities worldwide over the next two decades will cause significant risks to people and the global environment, according to analysis.
Researches from Yale and Stanford predict that by 2030 urban areas will expand by 590,000 square miles—nearly the size of Mongolia—to meet the needs of 1.47 billion more people living in urban areas.
“It is likely that these cities are going to be developed in places that are the most biologically diverse,” said Karen Seto, a famous scientist at Yale University. “They are going to be growing and expanding into forests, biological hotspots, savannas(热带稀缺大草原), coastlines—sensitive and vulnerable places.”
Urban areas, they found, have been expanding more rapidly along coasts. “Of all the places for cities to grow, coasts are the most sensitive. People and buildings along the coast are at risk of flooding and other environmental disasters,” said Seto.
The study provides the first estimate of how fast urban areas globally are growing and how fast they may grow in the future. “We know a lot about global patterns of urban population growth, but we know significantly less about how urban areas are changing,” she said. “Changes in land cover associated with urbanization lead to many environmental changes, from habitats loss and agricultural land conversion(转化) to changes in local and regional climate.”
The researchers examined studies that used satellite data to map urban growth and found that from 1970 to 2000 the world’s urban footprint had grown by at least 22,400 square miles—half the size of Ohio.
“This number is numerous, but, in actuality, urban land expansion has been far greater than what our analysis shows because we only looked at the published studies that used satellite data,” said Seto. “We found that 48 of the most populated urban areas have been studied using satellite data, with findings in journals. This means that we’re not tracking the physical expansion of more than half of the world’s largest cities.”
Half of urban land expansion in China is driven by a rising middle class, whereas the size of cities in India and Africa is driven primarily by population growth. “Rising incomes translate into rising demand for bigger homes and more land for urban development, which has a great effect on biodiversity conservations, loss of carbon sinks and energy use.”According to the passage, the most dangerous place for city expansion is the _____.
| A．forest | B．desert | C．savannas | D．coastline |
The underlined word “vulnerable” (in Para. 3) probably means “____”.
| A．diverse in plants | B．beautiful in scenery |
| C．easily damaged | D．very productive |
From Para. 5, we can infer that ____.
| A．urbanization is a good way to improve people’s standards of living |
| B．cities develop very fast and more and more people come to live in cities |
| C．more and more agricultural farmlands are used to make room for local animals |
| D．in the past, researchers focused their attention on the expanding urban areas |
Cities in Africa become bigger and bigger mainly because of their ____.
| A．growing population | B．rising middle class |
| C．unique living patterns | D．economic development |
A. Adults keep pets with their children
B. Pet keeping has a very long history
C. Pet-keeping may do hard to animals
D. People keeps pet for their aesthetic need
E. Caged pets become increasingly popular
F. Pet-keeping is helpful for children’s growths___________
Pet-keeping is a time-honored tradition. One of the reasons for people to raise to raise dogs or cows was usefulness. While people in the past hunted animals and kept them in their backyards, the civilized man today is less cruel towards them and is less exploitative(利用的).___________
We keep animals as pets because they are attractive. We all have the urge to possess something that has aesthetic value, and that is why we treasure paintings or fine furniture. Keeping pets is one form of this urge. A Siamese cat in the house can be a decorative objective. Pets are playful animals and they amuse us. A little rabbit amuses us by its playful and lively runs. ___________
Many parents find it helpful to have pets in their house and for their children. Having pets is an excellent way of developing in children the love of animals and responsibility. Children get the opportunity to take on full responsibility for another creature’s life. It will be an educational experience for a child to watch the natural life cycle of an animal. There are psychological benefits for children. Pets are welcome friends for children who are lonely. Pets are excellent companions. Keeping pets means giving love and being loved. We find comfort in giving care and receiving care in return. We get pleasure from their appreciation and their behavior. ___________
As more people move into apartments, there are limitations on keeping of animals like dogs and monkeys. Therefore, caged animals have increased in popularity. Birds fall into this type. We keep them for their beautiful songs and feathers. Fishing keeping is a widespread hobby and the keeper can observe their behavior in the glass tank and study its entire life cycle. The cat is a fine house pet and it fits neatly into human habitation(居住地) without requiring its own cage. They are wonderful hunters, if there are rats around. ___________
Pets satisfy man’s desire to care for a bit of nature. The pet owner has the responsibility for supplying those needs nature provides. Pets are amusing and entertaining, but we are in a way doing animals harm by making them live in a human environment. Are we not enslaving(奴役)them?
There is a common belief among parents that schools are no longer interested in spelling. No school I have taught in has ever considered spelling unimportant as a basic skill. There are, however, quite different ideas about how to teach it, or how much priority (优先) it must be given over general language development and writing ability. The problem is, how to encourage a child to express himself freely in writing without holding him back with spelling.
If spelling becomes the only point of his teacher’s interest, clearly a bright child will be likely to “play safe”. He will write only words within his spelling range (范围). That’s why teachers often encourage the early use of dictionaries and pay attention to content rather than technical ability.
I was once shocked to read on the bottom of a sensitive piece of writing about a personal experience:“This work is terrible! There are far too many spelling mistakes.” It may have been a sharp criticism(批评) of the pupils technical abilities in writing, but it was also a sad thing for the teacher who had omitted (略过) to read the composition, which contained some beautiful expressions of the child’s deep feelings. The teacher was not wrong to draw attention to the mistakes, but if his priority had centered on the child's ideas, an expression of his disappointment with the presentation would have given the pupil more hope to seek improvement.The expression “play safe” probably means ____.
| A．to write carefully | B．to do as teachers say |
| C．to use dictionaries frequently | D．to avoid using words one is not sure of |
Teachers encourage the use of dictionaries so that____.
| A．students will be able to express their ideas more freely |
| B．teachers will have less trouble in correcting mistakes |
| C．students will have more trust in writing |
| D．students will learn to spell words correctly |
The writer seems to think that the teacher’s judgement on that sensitive piece of writing is____.
| A．reasonable | B．unfair | C．foolish | D．careless |
The major point discussed in the passage is _______.
| A．the importance of developing writing skills |
| B．the importance of spelling |
| C．the correct way of marking composition |
| D．the relationship between spelling and the content of a composition |
About 30 years ago, I left Cuba for the United States with my son. After getting settled finally in Brunswick, New Jersey, I enrolled(注册) my son in kindergarten. Several weeks later, my son’s teacher asked me to meet him at his office.
In the teacher’s office, and exchange of greetings was followed by his questions: “ Is your son mentally retarded(弱智的)? Does he suffer from any kind of mental disability?”
Was he talking about my wonderful Scola? No, no, it can’t be. What a helpless, lonely moment! I told him that Scola was a quiet, sweet little boy, instead. I asked him why he was asking me all these questions.
My son could not follow the teacher’s directions, he told me, and thus, Scola was disrupting the class. Didn’t he know my son did not speak English yet?
He was angry: “ Why hasn’t your son been taught to speak English? Don’t you speak English at home?”
No, I didn’t speak English at home, I replied. I was sure my son would learn English in a couple of months, and I didn’t want him to forget his native language. Well, wrong answer! What kind of person would not speak in English to her son at home and at all times? “ Are you one of those people who come to this country to save dollars and sent them back to their country, never wanting to be a part of this society?”
Needless to say, I tried to tell him I was not one of “ those people.” Then he told me the meeting was over, and I left.
As I had expected, my son learned to speak English fluently before the school year was over. He went on to graduate from college and got a job, earning close to six figures. He travels widely and leads a well-adjusted, contented life. And he has benefited from being bilingual(双语的)。
Speaking more than one language allows people to communicate with others; it teaches people about other cultures and other places- something very basic and obviously lacking in the “educator” I met in New Jersey.The teacher asked the author to his office________.
| A．to work out a study plan for Scola |
| B．to get Scola enrolled in kindergarten |
| C．to discuss Scola’s in-class performance |
| D．to find a language partner for Scola |
What does the underlined word “disrupting” in Paragraph 4 probably mean?
| A．Attending | B．Disturbing | C．Breaking | D．Following |
The author’s attitude towards being bilingual may best be described as __________.
| A．positive | B．critical | C．casual | D．passive |
This text is likely to be selected from a book of __________.
| A．geography | B．medicine | C．history | D．education |
HONG KONG — Hong Kong Disneyland is too crowded, a senior Chinese tourism official said today, hinting that another Disney Park is necessary to accommodate demand from China’s huge population.
The comments by Shao Qiwei, director of China’s State Administration of Tourism, came a day after Shanghai’s mayor Han Zheng said the city was preparing to build China’s second Disney theme park.
“China has a very large population. We now have 1.3 billion people. The market is very large. As far as I know, Hong Kong Disneyland is now very crowded,” said Shao, whose comments were broadcast on Hong Kong’s Cable TV.
The Hong Kong theme park, which opened in September, was widely criticized in January when it turned away hundreds of Lunar New Year holiday makers from mainland China because the park was full. Chaos(混乱) erupted when angry crowds tried to force their way into the park.
The embarrassing incident prompted a public apology from Hong Kong Disneyland Managing Director Bill Ernest and a dressing down from Hong Kong’s leader Donald Tsang. Authorities are carefully studying the issue of overcrowding in preparation for the possible building of the Disney park in Shanghai, Shao said.
The official Xinhua News Agency reported Tuesday that no agreement has been reached on the park in Shanghai, quoting senior vice president of Walt Disney Parks and Resorts, Leslie Goodman. Hong Kong Disneyland is a joint venture between The Walt Disney Co. and the local government, which shouldered the bulk of the park’s construction fees.Why is it necessary to build a Disney park in Shanghai?
| A．Hong Kong Disneyland can’t meet the need of the large population. |
| B．Hong Kong Disneyland is too small and very crowded. |
| C．Hong Kong Disney Park was criticized by tourists. |
| D．Hong Kong Disneyland is far from the mainland. |
Hundreds of visitors from Mainland China got angry because ________.
| A．the services in the park were not as good as expected | B．they were not allowed to go into the park |
| C．the park was too crowded | D．chaos happened at the entrance to the park |
The building of a Disney park in Shanghai ________.
| A．has been agreed to by The Walt Disney Co. |
| B．is financed The Walt Disney Co. |
| C．will be in the charge of the Shanghai government |
| D．remains to be discussed with The Walt Disney Co. |