请阅读Passage l。完成第21—25小题。

　　Passage 1

　　It's one of our common beliefs that mice are afraid of cats. Scientists have long known that even if a mouse has never seen a cat before, it is still able to detect chemical signals released from it and run away in fear. This has always been thought to be something that is hard-wired into a mouse s brain.

　　But now Wendy Ingram, a graduate student at the University of California, Berkeley, has challenged this common sense. She has found a way to"cure" mice of their inborn fear of cats by infecting them with a parasite, reported the science journal Nature.

　　The parasite, called Toxoplasma gondii, might sound unfamiliar to you, but the shocking fact is that up to one-third of people around the world are infected by it. This parasite can cause different diseases among humans, especially pregnant women--it is linked to blindness and the death of unborn babies.

　　However, the parasite's effects on mice are unique. Ingram and her team measured how mice reacted to a cat's urine(尿) before and after it was infected by the parasite. They noted that normal mice stayed far away from the urine while mice that were infected with the parasite walked freely around the test area.

　　But that's not all. The parasite was found to be more powerful than originally thought—even after researchers cured the mice of the infection. They no longer reacted with fear to a cat's smell,which could indicate that the infection has caused a permanent change in mice's brains.

　　Why does a parasite change a mouse's brain instead of making it sick like it does to humans?

　　The answer lies in evolution.

　　"It's exciting scary to know how a parasite can manipulate a mouse's brain this way," Ingram said. But she also finds it inspiring."Typically if you have a bacterial infection, you go to a doctor and take antibiotics and the infection is cleared and you expect all the symptoms to also go away."

　　She said, but this study has proven that wrong."This may have huge implications for infectious disease medicine."

　　21. The passage is mainly about__________.

　　A. mice' s inborn terror of cats

　　B. the evolution of Toxoplasma

　　C. a new study about the effects of a parasite on mice

　　D. a harmful parasite called Toxoplasma gondii

　　22. The underlined part "hard-wired" in Paragraph 1 probably means__________.

　　A. deeply rooted

　　B. quickly changed

　　C. closely linked

　　D. deeply hurried

　　23. The experiment found that mice infected with toxoplasma gondii__________.

　　A. stayed far away from cat's urine

　　B. moved around the area freely and tearlessly

　　C. because more sensitive to cat's smell

　　D. were more afraid of cats

　　24. Which of the following statements is true according to the passage?

　　A. Toxoplasma gondii causes people strange and deadly diseases.

　　B. With certain infection the infectious disease cannot be cured completely.

　　C. Human beings infected by toxoplasma gondii will have permanent brain damage.

　　D. Toxoplasma gondii is harmful to human beings, but it does no harm to mice.

　　25. The author's attitude towards the experiment is__________.

　　A. positive

　　B. subjective

　　C. negative

　　D. objective

　　请阅读Passage 2，完成第26-30小题。

　　Passage 2

　　Exceptional children are different in some significant ways from others of the same age, for the same age, for these children to develop to their full adult potential, their education must be adapted to those differences.

　　Although we focus on the needs of exceptional children, we find ourselves describing their environment as well. While the leading actor on the stage captures our attention, we are aware of the importance of the supporting players and the scenery of the play itself. Both the family and the society in which exceptional children live are often the key to their growth and development. And it is in the public schools that we find the full expression of society's understanding the knowledge,hopes, and fears that are passed on to the next generation.

　　Education in any society is a mirror of that society. In that mirror we can see the strengths, the weaknesses, the hopes, the prejudices, and the central values of the culture itself. The great interest in exceptional children shown in public education over the past three decades indicates the strong feeling in our society that all citizens, whatever their special conditions, deserve the opportunity to fully develop their capabilities.

　　"All men are created equal." We've heard it many times, but it still has important meaning for education in a democratic society. Although the phrase was used by this country's founders to denote equality before the law, it has also been interpreted to mean equality of opportunity. That concept implies educational opportunity for all children--the right of each child to receive help in learning to the limits of his or her capacity, whether that capacity be small or great. Recent court decisions have confirmed the right of all children--disabled or not--to an appropriate education,and have ordered that public schools take the necessary steps to provide that education. In response,schoolsaremodifying theirprograms,adaptinginstructiontochildrenwhoare exceptional, to those who cannot profit substantially from regular programs.

　　26. In Paragraph 2, the author cites the example of the leading actor on the stage to show that__________.

　　A. the growth of exceptional children has much to do with their family and the society

　　B. exceptional children are more influenced by their families than normal children are

　　C. exceptional children are the key interest of the family and society

　　D. the needs of the society weigh much heavier than the needs of the exceptional children

　　27. The reason that the exceptional children receive so much concern in education is that__________.

　　A. they are expected to be leaders of the society

　　B. they might become a burden of the society

　　C. they should fully develop their potentials

　　D. disabled children deserve special consideration

　　28. This passage mainly deals with__________.

　　A. the differences of children in their learning capabilities

　　B. the definition of exceptional children in modern society

　　C. the special educational programs for exceptional children

　　D. the necessity of adapting education to exceptional children

　　29. From its passage we learn that the educational concern for exceptional children__________.

　　A. is now enjoying legal support

　　B. disagrees with the tradition of the country

　　C. was clearly stated by the country's founders

　　D. will exert great influence over court decisions

　　30. Which of the following is TRUE according to the passage?

　　A. Exceptional children refer to those with mental or physical problems.

　　B. The author use"All men are created equal" to counter the school program for the

　　exceptional children.

　　C. Recent court decisions confirm the rights of the exceptional children to enjoy the equal rights to learn with the normal ones.

　　D. Regular school programs fail to meet the requirements to develop the potential of exceptional children.

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