A classic series of experiments to determine the effects of overpopulation on communities of rats was conducted by a psychologist，John Calhoun．In each experiment，an equal number of male and female adult rats were placed in an enclosure（场地）．The rat populations were allowed to increase．Calhoun knew from experience approximately how many rats could live in the enclosures without experiencing stress due to overcrowding．He allowed the population to increase to approximately twice this number Then he fixed the population by removing the children that were not dependent on their mothers．At the end of the experiments，Calhoun was able to conclude that overcrowding causes a breakdown in the normal social relationships among rats，a kind of social disease．The rats in the experiments did not follow the same patterns of behavior as rats would in a community without overcrowding．

       The females in the rat population were the most seriously affected by the high population density（密度）．For example，mothers sometimes deserted their children，and，without their mothers’care，the children died．The experiments showed that in overpopulated communities，mother rats do not behave normally．Their behavior may be considered diseased and pathological（病理学的）．

       The leading males in the rat population were the least affected by over population．Each of these strong males claimed an area of the enclosure as his own．Therefore，these individuals did not  experience the overcrowding in the same way as the other rats did．．However leading males did behave pathologically at times．Their antisocial（反社会）behavior consisted of attacks on weaker male，female，and immature rats．This unusual behavior showed that even though the leading males had enough living space，they too were affected by the general overcrowding．

       Non-leading males in the experimental rat communities also exhibited unusual social behavior．Some withdrew（缩回） completely ,avoiding contact with other rats．Other non-leading males were too active，chasing other rats and fighting each other．

       The behavior of the rat population has similarity in human behavior．People in densely（密） populated areas exhibit unusual behavior similar to that of the rats in Calhoun’s experiments．In large urban areas，such as New York City，London，and Cairo，there are deserted children．There are cruel，powerful individuals，both men and women．There are also people who withdraw and people who become too active．Is the major cause of these disorders（混乱）overpopulation?

       Calhoun’s experiments suggest that it might be．In any case，social scientists and city planners have been influenced by the results of this series of experiments．

Which of the following inferences（推断）can NOT be made from the first paragraph?

       A．Overpopulation causes pathological behavior in rat populations．

       B．Calhoun had experimented with rats before．

       C．Calhoun’s experiment is still considered important today

       D．Stress does not occur in rat communities unless there is overcrowding．

The author implies that the behavior of the leading male rats is sometimes similar to that of

       A．people who would like to keep to themselves 

       B．people who abandon their children

       C．too active people

       D．cruel，powerful people

The main point of this passage is that _______________．

       A．although rats are affected by overcrowding，people are not

       B．overcrowding may be an important cause of social pathology

       C．the social behavior of rats is seriously affected by overcrowding

       D．Calhoun's experiments have influenced many people

A number of times Rosemary edged closer to Gordon , meaning to take his arm, but he edged away from her. She thought that she had offended him deeply, and that he was disappointed because she had pushed him away. She would have apologized if he had given her half a chance. But as a matter of fact, he was scarcely thinking of this any longer. It was the money business that was troubling him now. And the fact was that he would soon have to confess it. What nonsense it made of all he had said! Presently she stopped him, and swung him round to face her. “Gordon, why won’t you speak to me?” she said. “Are you still angry with me for what happened just now?”
“No, I was never angry with you. You’re not to blame. Something else has been worrying me all the way along, I’ve only eight pence left. I had just enough money for today when we started out, but that dinner bill upset everything. Can you lend me some money?’
Rosemary was amazed. “What does it matter if you’ve only eight pence left? How can you let yourself be worried by a thing like that? As though I objected to lending you money, aren’t I always telling you that I want to pay for myself when we go out together?’
“Yes, and you know how I hate you paying.”
“Oh, how silly you are.” She said. “Do you think there’s anything to be ashamed of in having no money?”
Gordon’s face went bright pink. “Of course there is ! It’s the only thing in the world there is to be ashamed of. I can’t be a complete human being—I don’t feel a human being –unless I’ve got money in my pocket.”
【小题1】What gave Rosemary the idea that she had hurt Gordon’s feelings deeply?

A classic series of experiments to determine the effects of overpopulation on communities of rats was conducted by a psychologist，John Calhoun．In each experiment，an equal number of male and female adult rats were placed in an enclosure（场地）．The rat populations were allowed to increase．Calhoun knew from experience approximately how many rats could live in the enclosures without experiencing stress due to overcrowding．He allowed the population to increase to approximately twice this number Then he fixed the population by removing the children that were not dependent on their mothers．At the end of the experiments，Calhoun was able to conclude that overcrowding causes a breakdown in the normal social relationships among rats，a kind of social disease．The rats in the experiments did not follow the same patterns of behavior as rats would in a community without overcrowding．
The females in the rat population were the most seriously affected by the high population density（密度）．For example，mothers sometimes deserted their children，and，without their mothers’care，the children died．The experiments showed that in overpopulated communities，mother rats do not behave normally．Their behavior may be considered diseased and pathological（病理学的）．
The leading males in the rat population were the least affected by over population．Each of these strong males claimed an area of the enclosure as his own．Therefore，these individuals did not  experience the overcrowding in the same way as the other rats did．．However leading males did behave pathologically at times．Their antisocial（反社会）behavior consisted of attacks on weaker male，female，and immature rats．This unusual behavior showed that even though the leading males had enough living space，they too were affected by the general overcrowding．
Non-leading males in the experimental rat communities also exhibited unusual social behavior．Some withdrew（缩回） completely ,avoiding contact with other rats．Other non-leading males were too active，chasing other rats and fighting each other．
The behavior of the rat population has similarity in human behavior．People in densely（密） populated areas exhibit unusual behavior similar to that of the rats in Calhoun’s experiments．In large urban areas，such as New York City，London，and Cairo，there are deserted children．There are cruel，powerful individuals，both men and women．There are also people who withdraw and people who become too active．Is the major cause of these disorders（混乱）overpopulation?
Calhoun’s experiments suggest that it might be．In any case，social scientists and city planners have been influenced by the results of this series of experiments．
【小题1】Which of the following inferences（推断）can NOT be made from the first paragraph?

A Leap（跳跃）to Honor

Leaping on a narrow balance beam（平衡木） is not easy. But Lola Walter, a 13-year-old gymnast, is an expert at it.

To perfect her skills, Lola   36   for four hours a day, five days a week. At the state championships in March, she finished seventh out of 16 girls.

That’s especially impressive,          37    she is legally blind, born with a rare condition that causes her eyes to shift constantly. She often sees double and can’t _38   how far away things are.

When she was little, her mom   39  that even though she couldn’t see         40   , she was fearless. So her mom signed her up for gymnastics when she was three. She loved the    41    right away and gymnastics became her favorite.

Though learning gymnastics has been more    42   for her than for some of her tournaments, she has never quit. She doesn’t let her _43  stop her from doing anything that she wants to.

She likes the determination it takes to do the sport. Her biggest          44_ is the balance beam. Because she has double vision, she often sees two beams. She must use her sense of touch to help her during her routine. Sometimes she even closes her eyes. “You have to          45_ your mind that it’ll take you where you want to go,” says Lola.

To be a top-level gymnast, one must be brave. The beam is probably the most   46  for anyone because it’s four inches wide. At the state competition, Lola didn’t fall      47  the beam. In fact, she got an 8.1 out of 10---- her highest score yet.

Lola doesn’t want to be          48    differently from the other girls on her team. At the competitions, the judges don’t know about her vision _49 _. She doesn’t tell them, because she doesn’t think they need to know. Her mom is amazed by her _50          attitude.

Lola never thinks about   51__. She is presently at level 7 while the highest is level 10 in gymnastics. Her   52         is to reach level 9. She says she wants to be a gymnastics coach to pass down what she’s learned to other kids    53  she grew up.

Lola is   54  of all her hard work and success. She says it’s helped her overcome problems in her life outside gymnastics, too. Her   55        for others is “just believe yourself”.

1.                A．runs           B．teaches         C．trains D．dances

2.                A．since           B．unless          C．after D．though

3.                A．tell            B．guess          C．assume   D．predict

4.                A．suspected       B．remembered    C．imagined D．noticed

5.                A．deeply         B．well            C．ahead    D．closely

6.                A．task           B．sport           C．event    D．show

7.                A．boring         B．enjoyable       C．difficult   D．unsatisfactory

8.                A．talent          B．quality          C．nature   D．condition

9.                A．doubt          B．advantage       C．challenge D．program

10.               A．examine        B．express        C．open D．trust

11.               A．fearful         B．harmful        C．unfair D．inconvenient

12.               A．to             B．on            C．off   D．against

13.               A．greeted        B．treated         C．served    D．paid

14.               A．pains          B．stresses        C．injuries    D．problems

15.               A．positive        B．friendly        C．flexible    D．caution

16.               A．defending      B．quitting         C．winning   D．bargaining

17.               A．standard        B．range          C．view  D．goal

18.               A．until           B．as             C．when D．before

19.               A．proud          B．tired           C．ashamed   D．confident

20.               A．plan           B．advice         C．reward    D．Responsibility

A new power plant in Nakoso, Japan, might someday change everything for coal plants．Since the new power plant fired up in September, the designer, Mistubishi, is expecting to prove it's possible to burn coal without polluting．This technology is known as integrated gasification combined cycle （IGCC）．Proving IGCC works should give Mitsubishi's US partner, NRG Energy, the jump other hurdles to building new clean plants．

The project promised to solve the problem of the ages for power plants: how to produce cheap, clean, reliable electricity．No existing technology can do all three perfectly．

The problem is IGCC isn't there yet．It costs about 20 percent more than traditional plants．And even though it's easier to collect the resulting carbon dioxide from an IGCC plant than a traditional plant, there's no proven way to get rid of the greenhouse gas．One plan is to drill a shaft（通道） to pump the carbon dioxide underground, into saltwater formations．But there's no guarantee it will remain underground forever．

NRG administrators think solving the IGCC riddles is worth the trouble because they expect the U．S．will soon limit the amount of carbon dioxide that power generators may give out ．

"With the additional cost of IGCC, to just voluntarily build something that's 20 percent more expensive, that’s commercial suicide," NRG chief administrator, David Crane said．

NRG administrators expect the cost to decline after six or seven plants are built．But other industry experts think it will take about a dozen plants for the price to be competitive with traditional coal plants．

Takaya Watanabe, a vice general manager of Mitsubishi, admits that the cost challenges are difficult．“It’s good for a company to say we want to be green, but unless someone is willing to pay, it's a dream．It won't keep our family eating rice," he said．

1.What is expected of the new technology?

    A．To make electricity without polluting the air．

    B．To produce energy without burning coal．

    C．To keep the use of electricity cheaper．

    D．To pump carbon dioxide more easily ．

2.What's the biggest problem the companies are faced with?

    A．How to pump greenhouse gases．

    B．How to deal with the high cost．

    C．How to get along with other partners．

    D．How to improve the new technology．

3.What can be inferred from the passage?

    A．New technologies are unacceptable to people．

    B．It's unlikely to build more new power plants．

    C．The companies are run on a tight budget．

    D．Going green is easier said than done．