It began as a game: high school and college students studying computer technology figured out they could use personal computers to break into telephone company computers and make free, long-distance telephone calls. These young computer gifts soon gained the nickname "hackers （黑客）".
Police arrested a few hackers, but many went on to even more complex hacking. One hacker was arrested for making illegal telephone calls and later used a prison phone to change a police officer's credit records to get back at （报复） the officer for arresting him. The hacker also used a computer to change his college records to give himself better grades.
As hackers gained experience, they began invading computers at banks, airlines and other businesses. In one plan, a hacker instructed an airline's computer to give him free airplane tickets.
The U.S. government is worried hackers may break into its complex networks of defense computers. The government's classified secrets are vulnerable （脆弱的） because thousands of government computers are connected by telephone lines that hackers can tap into.
In November 1988, a college student tapped into a non-classified U.S. Defense Department computer network called Arpanet. The hacker injected （输入，注入） a computer program that left copies of itself throughout Arpanet. Some hackers use each "virus " to destroy all the data in a computer. But in this case, government officials shut down the network before the program reached every computer in the system. Shutting down the system angered many researchers who were using the computers. The hacker turned himself in （自首） to police and told them how to get his program out of the computer system. He was charged with a crime.
The incident attracted computer hacking in the United States. Many companies have hired experts to protect their computers from hackers, and many computer experts now advise companies on how to protect their computers.
The U.S. government believes foreign governments have hired hackers to try to break into top-secret defense computers. It fears a hacker could inject a virus into military computers that would clean up all the data during a war.
Experts disagree over whether a computer network can ever be safe from hacking. But in the future, some of the most brilliant minds in the U.S. will be working to ruin the efforts of computer hackers and spies.
71．The main idea of the article is that _______________．
A．computer hackers only want to make free long-distance phone calls
B．the government wants to hire computer hackers to spy on the Russians
C．computer hackers are a danger to private companies and government secrets
D．many companies have hired experts to protect their computers from hackers carrying viruses
72．A computer "virus" is like a human virus because it _______________．
A．makes a computer cough and throw up
B．spreads from one computer to another
C．can clean up a person's doctor bills
D．requires regular visits to a doctor
73．A hacker can be dangerous because ________________．
A．he knows how to make free long-distance telephone calls
B．information is stored in computers, and a hacker knows how to destroy the information
C．once in prison, he can use a telephone to operate his computer
D．a hacker who steals a free airplane ticket might take a doctor of that seat on the airplane
74．U.S．government computers are vulnerable to a hacker because _____________．
A．the government always pays its telephone bills on time
B．the Russians know what's in the U.S．computers
C．viruses attack only government computers
D．many government computers are connected by telephone lines
75．In the future ________________．
A．some most brilliant minds in America will be working to stop computer hackers and spies
B．hackers will begin invading computers at banks, airlines and other businesses
C．many computer hackers will be arrested for making free telephone calls
D．some computer hackers will turn themselves in to the police
We often think of future．We often wonder what the world would be like in a hundred years' time.
Think of space, perhaps a permanent(永久的) station on the moon will have been set up．Perhaps people will be able to visit the moon as tourists．Cheap rockets for space travel will have been developed, permitting long journeys throughout the solar system(太阳系)．When that time comes, people will be taking holidays in space and visiting other planets．Great progress will have been discovered for the most terrible of all diseases—cancer．Pollution is a problem we must solve．In a hundred years' time it will have been controlled.
All the world will have been developed—even Antarctica．There will be large cities in Antarctica．We already have supersonic(超音速的) flight, but in a hundred years' time we will have supersonic land travel as well.
We will have used up most of earth's land to build our cities, so floating cities will have been built．The Japanese already have plans for cities of this kind．And there will be cities under the sea．The first of these will have been completed.We will have developed __________ in a hundred years' time, permitting long journeys all over the solar system.
| A．cheap rockets for space travel | B．a plane for space travel |
| C．a permanent spaceship | D．a satellite for tourists |
The last paragraph mainly talks about _____________.
| A．new ways of building cities | B．the building of cities under the sea |
| C．the building of floating cities in Japan | D．the danger which earth's land will face |
The best title for the passage is ______________.
| A．Travel in the Future | B．Future Life |
| C．Where to Live in the Future | D．Space Travel |
“Cool” is a word with many meanings. Its old meaning is used to expressa temperature that is a little bit cold．As the world has changed, the word has had many different meanings. “Cool” can be used to express feelings of interest in almost anything. When you see a famous car in the street, maybe you will say, “It’s cool.” You may think, “He’s so cool,” when you see your favorite footballer. We all maximize（扩大）the meaning of “cool”. You can use it instead of many words such as “new” or “surprising”. Here’s an interesting story we can use to show the way the word is used．A teacher asked her students to write about the waterfall （瀑布） they had visited．On one student’s paper was just the one sentence, “It’s so cool. ” Maybe he thought it was the best way to show what he saw and felt. But the story also shows a scarcity（缺乏）of words. Without “cool”, some people have no words to show the same meaning. So it is quite important to keep some credibility （可信性）. Can you think of many other words that make your life as colorful as the word “cool”? I can. And I think they are also very cool .We know that the word “cool” has had ________________
| A．only one meaning | B．no meanings |
| C．many different meanings | D．the same meaning |
In the passage, the word “express” means “_____________”
| A．see | B．show | C．know | D．feel |
In the passage, the writer suggests（暗示） that the word “cool”__________
| A．can be used instead of many words | B．usually means something interesting |
| C．can make your life colorful | D．may not be as cool as it seems |
The summer I was ten, my mother decided to bring us to the world of art. My brother and I were not very excited when we realized what my mother meant. What she meant was that we would have to spend one afternoon a week with her at the Fine Arts Museum. Before each visit to the museum, she made us read about artists and painting styles. It was almost as bad as being in school. Who wants to spend the summer thinking about artists when you could be with your friends at the swimming pool?
First we had to read about ancient Egyptians and their strange way of painting faces and then go to look at them at the museum. My 12-year-old brother thought this was so funny, but I was not interested. Later we had to learn about artists in the Middle Ages who painted people wearing strange long clothing. We had to look at pictures of fat babies with wings and curly (鬈曲的) hair and with no clothes on flying around the edges of paintings. I certainly couldn't see what was so great about art.
On our last visit to the museum, something happened when I saw a painting by a woman called Mary. In it, a woman was reading to a child. The colors were soft and gentle, and you could tell by the mother' s expression how happy she was just to be with the child. I couldn't stop looking at this painting ! I wanted to see every painting Mary had ever made! It was really worth looking at so many paintings to find a painter who could interest me so much.
53. The aim of the mother' s plan was to _________.
A. take them to visit the museum B. introduce them to the world of art
C. ask them to read about artists D. show them different painting styles
54. What was the writer' s experience in the museum before the last visit?
A. She came to feel her mother' s love. B. She liked many paintings.
C. She hardly enjoyed herself. D. She could understand the pictures of fat babies.
55. What made the writer go through a change that summer?
A. One of Mary's paintings. B. A strange way of painting.
C. Artists in the Middle Ages. D. Her mother' s instruction.
56. From the text, we can see _________.
A. the importance of curiosity B. the effect of art
C. the value of learning D. the power of family education
About ten years ago, a young and very successful businessman named Josh was traveling down a Chicago neighborhood street. He was going a bit too fast in his shiny, black, Jaguar XKE, which was only two months old.
He was watching for kids rushing out from between parked cars and slowed down when he thought he saw something. As his car passed, no child came out, but a brick sailed out and — WHUMP! — it hit the Jag’s shiny black side door! SCREECH...!!!! Immediately Josh stopped the car, jumped out, seized the kid and pushed him up against a parked car. He shouted at the kid, "What was that all about and who are you? Just what are you doing?!" Building up a head of steam, he went on. “That’s my new car. That brick you threw is gonna cost you a lot of money. Why did you throw it?"
"Please, mister, please....I’m sorry! I didn’t know what else to do!" begged the boy. "I threw the brick because no one else would stop!" Tears were streaming down the boy’s face as he pointed around the parked car. "It’s my brother, mister," he said. "He rolled of the curb (路沿) and fell out of his wheelchair and I can’t lift him up. "Sobbing, the boy asked the businessman," Would you please help me get him back into his wheelchair? He’s hurt and he’s too heavy for me.”
Moved beyond words, the young businessman tried hard to swallow (咽下) the rapidly swelling lump in his throat. Straining, he lifted the young man back into the wheelchair and took out his handkerchief and wiped the scrapers and cuts, checking to see that everything was going to be OK. He then watched the younger brother push him down the sidewalk toward their home.
It was a long walk back to the black, shining Jaguar XKE — a long and slow walk. Josh never did fix the side door of his Jaguar. He kept the dent (凹痕) to remind him not to go through life so fast that someone has to throw a brick at him to get his attention. Feel for the bricks of life coming at you.
57. The boy threw a brick at the businessman’s car because ____________.
A. the businessman drove at a high speed B. he envied the new car very much
C. he wanted to ask for some money D. he wanted to get help from the driver
58. Which of the following is the right order of the story?
a. The younger brother threw a brick at Josh’s car. b. The elder brother fell out of his wheelchair.
c. The younger brother begged Josh for help.
d. Josh lifted the elder brother back into his wheelchair. e. Josh shouted at the younger brother.
A.b, a, e, c, d B. a, c, d, b, e C. b, a, c, e, d D. a, c, b, e, d
59. What can we learn from the passage?
A. Josh would accept the money from the kids. B. The two kids were Josh’s neighbors.
C. Josh was a kind-hearted man. D. Josh’s new car broke down easily.
60. According to the passage, the underlined sentence in the last paragraph means ____________.
A. trying to get ready for the trouble in your future life
B. driving fast in a neighborhood street is dangerous
C. trying to be more understanding seeing others in trouble
D. protecting oneself from being hurt
Alzheimer's disease is a major national health problem. Nearly 2 million Americans over the age of 65 have Alzheimer's disease. It is a leading cause of death among the elderly. But Alzheimer's disease is not confined (限于) to the aged. There may be a million or more people under the age of 65 suffering from the disease.
At one time, people suffering from the disease were said to be "getting old". The disease was thought to be a natural part of growing old, but it is now known that Alzheimer's disease strikes young and old alike. It is an organic(器官的) disease that destroys brain cells.
Alzheimer's disease affects the patient's memory, speech, and movement. In the beginning stages of the disease, the patient may seem slightly confused. He may have trouble speaking. Then the patient's memory begins to fail. He may forget dates, telephone numbers, names and plans.
As the disease progresses, the patient may not recognize family and friends. These symptoms(症状) often cause terrible anxiety in the patient. He may feel lost and frightened. Sometimes the patient reacts with wild and bad behavior.
In the last stages of the disease, the patient may not be able to take care of himself. He may have lost the ability to speak and walk.
Some of the scientists think a virus causes Alzheimer's disease. At present, there is no cure for the disease. But there are ways to slow its progress. Exercise and physical treatment can help the patients of this disease.
50. Alzheimer's disease ____________.
A. a terrible part of the aging process B. is an organic disease that affects young and old
C. can be cured by physical treatment D. causes high fever
51. All of the following are symptoms of Alzheimer's disease EXCEPT ____________.
A. brain damage B. difficulty in speaking C. loss of sight D. loss of the ability to walk
52. According to the passage, which of the following may be a cause of Alzheimer's disease?
A. Poisons produced by the brain. B. Getting old. C. A virus. D. Lack of exercise.
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