The modern age is an age of electricity. People are so used to electric lights, radio, televisions, and telephones that it is hard to imagine what life would be like without them. When there is a power failure, people grope about in flickering candlelight, cars hesitate in the streets because there are no traffic lights to guide them, and food spoils in silent refrigerators.
Yet, people began to understand how electricity works only a little more than two centuries ago. Nature has apparently been experimenting in this field for million of years. Scientists are discovering more and more that the living world may hold many interesting secrets of electricity that could benefit humanity.
All living cells send out tiny pulses of electricity. As the heart beats, it sends out pulses of record; they form an electrocardiogram, which a doctor can study to determine how well the heart is working. The brain, too, sends our brain waves of electricity, which can be recorded in an electroencephalogram. The electric currents generated by most living cells are extremely small，often so small that sensitive instruments are needed to record them. But in some animals, certain muscle cells have become so specialized as electrical generators that they do not work as muscle cells at all. When large numbers of these cells are linked together, the effects can be astonishing.
The electric eel is an amazing storage battery. It can send a jolt of as much as eight hundred volts of electricity through the water in which it lives. ( An electric house current is only one hundred and twenty volts, but two hundred and twenty volts in China.) As many as four-fifths of all the cells in the electric eel's body are specialized for generating electricity, and the strength of the shock it can deliver corresponds roughly to length of its body
56. Electricity was invented ______.
A. when man had no candles
B. about 200 years ago
C. to be operating computers.
D. by Thomse Edison
57. The following things can send out pulses of electricity except______.
A. electric eels and human hearts.
B. Electrical generators and animal muscle.
C. Stones and dry wood.
D. human brain and living cells.
58. The electric current send out by an eel can be
A. as much as 800 volts. B. about one hundred and twenty volts.
C. as high as the house current in China. D. stored in the water where it lives.
59. From this shot passage we can infer _____.
A. the shorter an eel is, the stronger electricity it produces.
B. we can always feel the electricity produced by living cells.
C. human beings get their knowledge about electricity from nature.
D. people learn about electricity from eels.
Read the following directions on a bottle of medicine：
“Take two tablets(药片)with water, followed by one tablet every eight hours, as required, For maximum(最大量) night-time and early morning relief(缓解疼痛), take two tablets at bed - time, Do not take more than six tablets in twenty-four hours.
For children six to twelve years old, give half the amount for a grownup. For children under six years old, ask for your doctor’s advice.
Reduce the amount if nervousness, restlessness, or sleeplessness occurs,”The directions on this medicine bottle clearly warn the patient not to take more than _____ .
| A．twenty-four tablets a day. | B．eight tablets a day. |
| C．six tablets a day. | D．three tablets a day. |
We can infer from the directions that ______ .
| A．the medicine could cause some people to feel nervous. |
| B．children may take the same amount that grown-ups take. |
| C．one may not take this medicine before going to bed. |
| D．the medicine is a liquid. |
If one cannot sleep, it is suggested that he _____ .
| A．take two tablets before going to bed. | B．take less than two tablets before going to bed. |
| C．stop taking the medicine. | D．ask advice of a doctor. |
Obviously the medicine _______ .
| A．may be dangerous to small children. |
| B．cannot be taken by children under twelve years old. |
| C．may be taken by children but not by grown-ups. |
| D．may be taken by grown-ups but not by children. |
Robert Frost was one of America’s best known and most honored serious writers. But his fame came late in his life.
He was born in San Francisco, California in 1874. He lived in California during his early childhood. He was named after the chief Southern general in America’s Civil War. The general’s name was Robert Edward Lee. The poet was named Robert Lee Frost, because his father wanted to honor the general.
Someone once asked another American writer, Ernest Hemingway, how to become a writer. The best thing, he said, was to have an unhappy childhood. If this is true, Robert Frost’s childhood was unhappy enough to make him a very good writer. Robert Frost’s father was a reporter who wanted to be a politician. He often drank too much wine and became angry. Robert was the victim (受害者) of his anger.
Robert Frost finished high school in 1891. After high school, Robert’s grandfather offered to pay his costs at Dartmouth College. But Robert left the school after a few months. He did not like it. He spent the next few years working at different jobs. At one time, he worked in a factory. Later, he repaired shoes. He was a teacher. He was a reporter. Always, he wrote poetry.
Robert Frost attended Harvard University for two years. After that, he returned to the many jobs he held before. For a while, Frost tried to take care of a farm in the state of New Hampshire. He was not a successful farmer. And he continued to write poetry. He said that until 1930, he earned only about ten dollars a year from writing.
In 1912, he decided to try to make a new start. He took his family to Britain. The cost of living was low. In Britain, Frost found a publisher for his first book of poems. The book was called A Boy’s Will. When it appeared in 1913. Frost received high praise from British readers. Praise was something he had not received in his own country.
Ezra Pound, another American poet living in Britain, read the poems and liked them very much. He wrote a magazine article about Frost. He also helped get Frost’s second book of poems published in America. That book was called North of Boston.The followings are writers EXCEPT ________.
| A．Robert Edward Lee | B．Robert Lee Frost |
| C．Ernest Hemingway | D．Ezra Pound |
The passage wrote about Hemingway in order to show that
| A．he had great influence on Frost’s poetry and life |
| B．Frost’ s poetry style was the same as Hemingway’s |
| C．Frost was unhappy because he was the victim of his father |
| D．Frost spent his childhood unhappily |
What can we learn from the passage?
| A．Once Frost’s first book was published he gained great praise in his country. |
| B．After leaving Harvard University, he began to learn to write poetry. |
| C．Frost was found lo have a gift in poetry while he studied in high school. |
| D．Robert Frost’s father was angry and drank a lot because he didn’t realize his dream. |
What’s the passage mainly about?
| A．Robert Frost’s unhappy childhood. | B．Robert Frost’s first and second book. |
| C．Robert Frost’s family and jobs. | D．Robert Frost’s life and poetry. |
A friend is better than fortune. A friend is worse than poison in some cases.
The two sentences above have opposite meanings and seem to be unreasonable, but they can be explained as follows: the first refers to all good friends who drive us towards good while the second all bad ones who lead us into bad ways.
My ideal friend is of course a good friend whose goodness is shown below — he has no bad habits, such as smoking and drinking. He lives in frugality (节俭). He studies hard so as not to waste his golden time. At home he honors his parents and loves his brothers; at school he respects his teachers and shares the feelings of his classmates. He treats those truly who are true to him. In a word, he has all the good characteristics that I don’t have. I can follow him as a model. With his help I can be free from all difficulties.
Indeed, if I have such a person as my friend, I shall never fear difficulty and I shall never know the existence of the word “failure”.This passage tells us ____.
| A．how to make friends with others |
| B．how to help friends |
| C．what kind of person the writer’s friend is |
| D．what kind of person we should make friends with |
According to the writer, an ideal friend refers to _______.
| A．a friend without bad habits |
| B．a famous man |
| C．a perfect man |
| D．a respectable man |
From the passage we can learn that ________.
| A．the writer and his ideal friend have a lot to learn from each other |
| B．the writer has a lot to learn from his ideal friend |
| C．the writer’s ideal friend has a lot to learn from him |
| D．the writer has only a little to learn from his ideal friend |
From the second paragraph, we can infer the writer is sure that _______.
| A．friendship means a great deal to him |
| B．nothing can be done without friends |
| C．he who does not smoke or drink must be a good friend |
| D．good friends should always help each other |
Nowadays, the increase in the prices of agricultural products is one of the greatest concerns of the people and the government. The government has announced a series of policies(政策) to prevent the prices from rising further. Rising housing prices is still a big concern for the people, but since farm products are needed every day, the increase in their prices has made life very difficult for them.
Many people may think the increase will help farmers. But have higher prices of farm products really benefited the farmers?
Take the increase in vegetable prices in the first half of this year for example. Though natural disasters such as droughts and spring frost did not cause the prices of farm products to increase greatly—in fact, prices of some products did not increase at all—vegetables have become dearer by as much as 20 percent compared to that of last year. This means only a small part (or even none) of the extra money that city people have paid to buy farm products has gone to the farmers. The extra cost actually has gone to middlemen.
As the fact shows, just increasing prices of farm products will have negative influence on the entire economy. On one hand, the price increase has created some abnormal phenomena, which hurts farmers’ interests. On the other hand, resources will enter the agriculture because of the high price of farm products, which would finally create negative effect on the whole economy.
In such a case, it would be better to leave the market to decide the prices instead of raising farm products’ prices to protect the interests of farmers. Actually, such a way will be better for farmers in the long run. What does the author mainly want to tell us by writing the passage?
| A．Farmers benefit a lot from the price increase. |
| B．Price increase has not helped farmers. |
| C．We should be sorry for farmers. |
| D．Price increase has a bad effect on economy. |
Many people think the increase in the prices of farm products benefits ______ .
| A． nobody | B．the country | C．middlemen | D．farmers |
The following statements are true EXCEPT ______ .
| A．the government has done something to prevent the prices from rising further |
| B．it is better for farmers to leave the market to decide the prices in the long run |
| C．natural disasters did not cause the prices of farm products to increase greatly |
| D．rising housing prices has made life very difficult for people |
What is probably the author’s attitude to raising the farm products’ prices?
| A．Negative. | B．Indifferent.(漠不关心的) |
| C．Enthusiastic. | D．Positive. |
Parents have widely different views on the problem of pocket money. Four new fathers were asked this question and this is how they answered.
Ashish Khanna: Although many argue that pocket money helps develop children’s sense of value, I don’t agree. I wouldn’t give my child any pocket money. First of all, I never got pocket money and I seem to have a good value for money. If my child ever needed something and I felt it was a reasonable (合理的) request, I would buy it for him.
Sharad Sanghi: No, I wouldn’t give my child pocket money because I don’t want to create the perception (观念) of “her” money and “my” money. Besides, if I refuse to buy her something that I think is bad for her, she may buy it with her pocket money on the sly. In this way, I would lose control over my child’s requests. I feel it also encourages children to care more about money than anything else. I don’t want my child to start judging other children by the amount of money or pocket money they have.
Rakesh Shah: Yes, I would give my child pocket money because I feel that children should learn to spend money properly. I will give him a fixed amount every month and if he spends the money before the month is over, he will learn a lesson and not spend money so freely. He will learn what his limitations (限制) are and feel the difficulty when he has to pay for something that is over his own pocket.
Rajiv Patel: Yes, I would give my child pocket money because it is important that he learns to manage money. But I would not give it to him on a weekly or monthly basis. He would have to earn it. If he helped me finish some of my jobs or helped his mother with housework, I would reward him. This helps him realize that “money does not grow on trees” and it requires hard work to earn money.Ashish Khanna may agree that _____.
| A．he was given too much pocket money when young |
| B．he can take much control of his child by money |
| C．he will buy anything he thinks his child really needs |
| D．pocket money helps children develop a good value for money |
The underlined phrase “on the sly” in Paragraph 3 is the closest in meaning to “_____”.
| A．for free | B．at a lower price |
| C．happily | D．secretly |
Who would give his child pocket money every month?
| A．Ashish Khanna. | B．Sharad Sanghi. |
| C．Rakesh Shah. | D．Rajiv Patel. |
What do Rakesh Shah and Rajiv Patel have in common?
| A．They want their children to learn to manage money from an early age. |
| B．They ask their children to get pocket money by working. |
| C．They teach their children the difficulty of making money. |
| D．They allow their children to spend money freely. |