Uncertainty spreads through our lives so thoroughly that it dominates our language，Our everyday speech is made up in large part of words like probably, many, soon,great,little.What do these words mean? 
Such verbal imprecision is not necessarily to be criticized. Indeed, it has a value Just because it allows uw to express judgments when a precise quantitative statement is out of the question.
We have been trying to pin down by experiments what people meari by these expressions in specific contexts, and how the meanings change with age. For instance,a subject is told "There are many trees in the park" and is asked to say what number the word may mean to him. Or a child is invited to take "some" sweets from a bowl and we then count how many he has taken. We compare the number he takes when he is alone with the number when one or more other children are present and are to take some sweets after him, or with the number he takes when told to give
“some" sweets to another child.
First, we find that the number depends, of course, on the items involved. To most people some friends means about five, while some trees means about twenty. However, unrelated areas sometimes show parallel values. For instance, the language of probability seems to mean about the same thing in predictions about the weather and about politics: the expression is certain to( rain,or be elected)signifies to the average person about a 70 percent chance; is likely to, about a 60 percent chance; probably will, about 55 percent.
Secondly, the size of the population of items influences the value assigned to an expression.Thus, if we tell a subject to take "a few" or“a lot of" glass balls from a box, he will take me if the box contains a large number of glass balls than if it has a small number, But not proportionately more: if we increase the number of glass balls eight times, the subject takes only half as large a percentage of the total.
Thirdly, there is a marked change with age. Among children between six and fourteen years old, the older the child, the fewer glass balls, he will take. But the difference between a lot and a few widens with age. This age effect is so consistent that it might be used as a test of intelligence.
51. What's the right attitude towards the words like probably, any and soon ?
A. They are inaccurate and we should avoid them.
B. They are necessary since we cannot be always precise.
C. They should be criticized because there are too many of them.
D. Their value is not yet clear since we don't know their meaning.
52. Why do we do experiments with the words many and some?
A. To prove that people are insensitive to these words.
B. To prove that the words dominate our everyday speech.
C. To find out how the meanings vary with age and contexts.
D. To find out whether the words can mean a precise quantity.
53. Which of the following expressions means a larger chance in weather broadcast?
A. Possible.   B. Probable.   C. Be likely to.  D. Be certain to.
54. Which of the following is similar to the underlined word signifies in its meaning?
A. makes    B. means     C. predicts    D. indicates
55. Which of the following can be the best title for the passage?
A. Uncertainty in the Language Use.
B. How to Use Language in an Uncertain Way
C.Uncertain Words and their Use in Specific Contexts
D. Experiments on Relationship between Uncertainty and Language Use

Insurance companies provide a service to the community by protecting it against expected and unexpected disasters. Before an insurance company will agree to insure anything, it collects accurate figures about the risk. It knows, for example, that the risk of a man being killed in a plane accident is less than the risk he takes in crossing a busy road. This enables it to quote(报价) low figures for travel insurance. Sometimes the risk may be high, as in motor-racing or mountaineering. Then the company charges a much higher price. If too many climbers have accidents, the price rises further. If the majority of climbers fall off mountains, the company will refuse to insure them.

An ordinary householder may wish to protect his home against fire or his property against burglary(入室行窃). A shopkeeper may wish to insure against theft. In normal cases, the company will check its statistics and quote a premium(保险费). If it is suspicious(可疑的), it may refuse to quote. If it insures a shop and then receives a suspicious claim, it will investigate the claim as a means of protecting itself against false claims. It is not unknown for a businessman in debt to burn down his own premises so that he can claim much money from his insurance company. He can be sure that the fire will be investigated most carefully. Insurance companies also accept insurance against shipwreck or disaster in the air. Planes and ships are very expensive, so a large premium is charged, but a reduction is given to companies with an accident-free record.

Every week, insurance companies receive premium payments from customers. These payments can form a very large total running into millions of dollars. The company does not leave the money in the bank. It invests (投资) in property, shares (股票) ,farms and even paintings and stamps. Its aim is to obtain the best possible return on its investment. This is not as greedy as it may seem since this is one way by which it can keep its premiums down and continue to make a profit while being of service to the community.

The main idea of the first paragraph is that      .

   A. insurance companies protect the community against disasters

   B. insurance companies often collect accurate figures about the risk

   C. insurance companies base their decisions on the risk involved

   D. insurance companies charge different prices in the same cases

The insurance company will usually investigate a suspicious claim to    .

   A. refuse to quote the insurance fee          B. make sure that the claim is reasonable

   C. decide how much the company should pay D. find out when the accident happened

The underlined word "premises" in Paragraph 2 most probably means"     "

   A. land and buildings                   B. insurance contract

   C. debt papers                                            D. financial papers

The author’s attitude towards customers’ premium payments being used by insurance companies is __

    A. critical             B. doubtful              C. neutral            D. positive

The purpose of this passage is to __

    A. explain how insurance companies operate

    B. encourage people to invest in insurance companies

    C. persuade people to insure against unexpected disasters

    D. advise people how to insure their life and property

Research by sociologists Scott Coltrance Michele Adams looked at national survey data and found that when men increase their share of housework and childcare, their children are happier, healthier and do better at school．What’s more, when school-aged children do housework with their fathers, they get along better with their peers and have more friends．And they show more positive behaviors than if they do the same work with their mothers．“Because fewer men do housework than women,” said Adams, “when they share the work，it has more influence on children．” Fathers model “co-operative family partnerships”．
When men share housework and childcare, it turns out, their partners are happier．Wives of egalitarian（主张人人平等的）husbands, regardless of class, report the highest levels of marital（婚姻的）satisfaction and lowest rates of depression，and are less likely to see therapists（治疗专家）．They are also more likely to stay fit, since they probably have more time on their hands．
And the benefits for men are even greater．Men who share housework and childcare are healthier--physically and psychologically．They smoke less, drink less, and take recreational drugs less often．They are more likely to stay in shape and more likely to go to doctors for routine screenings, but less likely to use emergency rooms or miss work due to illness．
In both Europe and the United States，Dad is becoming the “fun parent”．He takes the kids to the park and plays soccer with the kids; she stays home．“What a great time we had with Dad!” the kids announce as they burst through the kitchen door to a lunch mum prepared．
【小题1】We can infer from the first paragraph that         ．

A programmer and an engineer are sitting next to each other on a long flight from Los Angeles to New York. The programmer leans over to the engineer and asks if he would like to play a fun game. The engineer just wants to take a nap, so he politely declines and rolls over to the window to catch a few winks.
The programmer persists and explains that the game is really easy and has a lot of fun. He explains, “I ask you a question, and if you don’t know the answer, you pay me $5. Then you ask me a question, and if I don’t know the answer, I’ll pay you $5.” Again, the engineer politely refuses and tries to get to sleep.
The programmer, now somewhat agitated, says, “OK, if you don’t know the answer you pay me $5, and if I don’t know the answer, I’ll pay you $50!” This catches the engineer’s attention, and he sees no end to this torment(折磨) unless he plays, so he agrees to the game.
The programmer asks the first question. “What’s the distance from the earth to the moon?” The engineer doesn’t say a word, but reaches into his wallet, pulls out a five dollar bill and hands it to the programmer. Now, it’s the engineer’s turn. He asks the programmer, “What goes up a hill with three legs, and comes down on four?” The programmer looks up at him with a puzzled look. He takes out his laptop computer and searches all of his references. After about an hour, he wakes the engineer and hands him $50. The engineer politely takes the $50 and turns away to try to get back to sleep. The programmer, more than a little miffed, shakes the engineer and asks, “Well, so what’s the answer?” Without a word, the engineer reaches into his wallet, hands the programmer $5, and turns away and goes back to sleep.
【小题1】What’s the best title for the passage?

 Edward Wilson is America’s, if not the world’s, leading naturalist. In The Future of Life, he takes us on a tour of the world’s natural resources(资源). How are they used? What has been lost? What remains and is it able to continue with the present speed of use? Wilson also points out the need to understand fully the biodiversity(生物多样性)of our earth.

    Wilson begins with an open letter to the pioneer in environment (环境) protection, Henry David Thoreau. He compares today’s Walden Pond with that of Thoreau’s day. Wilson will use such comparisons for the rest of the book. The problem is clear: man has done great damage to his home over the years. Van the earth, with human help, be made to return to biodiversity levels that will be able to support us in the future?

Biodiversity, Wilson argues, is the key to settling many problems the earth faces today. Even our agricultural crops can gain advantages from it. A mere hundred species(物种) are the basis of our food supply, of which but twenty carry the load. Wilson suggests changing this situation by looking into ten thousand species that could be made use of, which will be a way to reduce the clearing of the natural homes of plants and animals to enlarge farming areas.

At the end of the book, Wilson discusses the importance of human values in considering the environment. If you are to continue to live on the earth, you may well read and act on the ideas in this book.

72. We learn from the text that Wilson cares most about ______

A. the environment for plants                    B. the biodiversity of our earth

C. the wastes of natural resources             D. the importance of human values

A. Twenty.   B. Eighty.    C. One hundred     D. Ten thousand.

74. Wilson suggests that one way to keep biodiversity is to _______.

A. learn how to farm scientifically             B. build homes for some dying species

C. make it clear what to eat                      D. use more species for food

75. We can infer that the text is _______

A. a description of natural resources         B. a research report

C. a book review                                    D. an introduction to a scientist.