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Passage One

From the moment that an animal is born it has to make decisions. It has to decide which of the things around it are for eating, and which are to be avoided; when to attack and when to run away. The animal is, in effect, playing a complicated and potentially very dangerous game with its environment, discomfort or destruction.

This is a difficult and unpleasant business and few animals would survive if they had to start from the beginning and learn about the world wholly by trial and error, for there are too many possible decisions which would prove fatal. So we find, in practice, that the game is always arranged in favor of the young animal in one way or another. Either the animal is protected during the early stages of its learning about the world around it, or the knowledge of which way to respond is built into its nervous system from the start.

    The fact that animals behave sensibly can be attributed partly to what we might call genetic learning, to distinguish it from individual learning that an animal does in the cause of its own life time. Genetic learning is learning by a species as a whole, and it is achieved by selection of those members of each generation that happen to behave in the right way. However, genetic learning depends upon a prediction that the future will more or less exactly resemble the past. The more variable individual experience is likely to be, the less efficient is genetic learning as a means of getting over the problems of the survival game. It is not surprising to find that very few species indeed depend wholly upon genetic learning. In the great majority of animals, behavior is a compound of individual experience and genetic learning to behave in particular ways.

(303 words)

1. The survival game is considered complicated and potentially very dangerous because ________. ( )

(a) decisions made by animals may prove fatal

(b) animals are often in danger of being attacked

(c) animals make decisions entirely by trial

(d) environment is not fit for animals to survive

2. Most animals survive because they can make right decisions by ________. ( )

(a) a series of trials and errors

(b) knowledge obtained in their life time

(c) the nervous system

(d) genetic learning and individual experience

3. Concerning the relationship between genetic learning and individual experience, which of the following is right? ( )

(a) They are irrelevant to each other.

(b) They are contradictory, but individual experience is the dominant.

(c) Genetic learning is likely to function more if individual experience doesn't vary much.

(d) Genetic learning is more efficient than individual experience.

4. "Genetic learning" refers to ________. ( )

(a) learning after an animal is born

(b) learning obtained by some members of each generation who happen to behave properly

(c) learning gained by all the members in a species

(d) learning gained by young animals from their experience

5. What CANNOT be inferred from the article? ( )

(a) The majority of animals depend thoroughly upon genetic learning.

(b) Animal behave in particular ways as a result of both individual experience and genetic learning.

(c) If an animal depended wholly upon individual experience, its chance of survival would be little.

(d) Genetic learning depends on the assumption of the resemblance between the future and the past.

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Passage Two

      There are two factors which determine an individual's intelligence. The first is the sort of brain he is born with. Human brains differ considerably, some being more capable than others. But no matter how good a brain he has to begin with, an individual will have a low order of intelligence unless he has opportunities to learn. So the second factor is what happens to the individual—the sort of environment in which he is reared. If an individual is handicapped environmentally, it is likely that his brain will fail to develop and he will never attain the level of intelligence of which he is capable.

    The importance of environment in determining an individual's intelligence can be demonstrated by the case history of the identical twins, Peter and Marx X. Being identical, the twins had identical brains at birth, and their growth processes were the same. When the twins were three months old, their parents died, and they were placed in separate foster homes. Peter was reared by parents of low intelligence in an isolated community with poor educational opportunities. Mark was reared in the home of well-to-do parents who had been to college. He was read to as a child, sent to good schools, and given every opportunity to be stimulated intellectually. This environmental difference continued until the twins were in their late teens, when they were given tests to measure their intelligence. Mark's I.Q. was 125, twenty-five points higher than the average and fully forty points higher than his identical brother. Given equal opportunities, the twins, having identical brains, would have tested at roughly the same level.

(269 words)

6. A person's intelligence ________. ( )

(a) stays unchanged in a certain environment

(b) develops with the change of environment

(c) is born at the same level as anyone else's

(d) is affected by environment as well as the sort of brain he is born with

7. What is meant by " he will never attain the level of intelligence of which he is capable"? ( )

(a) He will never fail to develop his intelligence

(b) He won't become so intelligent as he should  

(c) He is able to reach a high level of intelligence

(d) It is impossible for him to develop intelligence

8. Which of the following statements is true concerning the twins? ( )

(a) The sorts of brain they are born with differ greatly.

(b) They set up an example for studying the environment.

(c) They became orphans once they were born.

(d) They were adopted boys.

9. According to the text, the environment in which the twins were reared differs in the following aspects except ________. ( )

(a) intelligence level of the parents

(b) family economic status

(c) the age of their parents

(d) community surroundings

10. What is suggested by the last sentence of the text? ( )

(a) If the twins were given equal opportunities, they would be identical in their brains.

(b) If the twins were reared in the same family, their I.Q. would not be much different.

(c) The I.Q. of the twins with identical brains would reach exactly the same level.

(d) Equal opportunities have been given to the twins during the test.

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Passage Three

    "It is obvious that there is a limit to the power of reproducing sounds accurately", anyone can say Bo after once hearing it: but few would catch the name of the Greek statesman M. Papamicichaopoulos without the need of a repetition. It was with these words that J. Jacobs, a British psychologist, introduced the first experimental study of "memory span". The span is the name given to the maximum amount of material which can be "grasped" (recalled immediately) after a single presentation. Now, this, like the great majority of psychological performances, is variable rather than constant. The same person may, at one time, correctly recall a list of eight digits, yet, at another time, be unable to do so. This does not mean that the amount recalled is unpredictable but it does warn against facile pronouncements concerning a person's span based on but a few tests. It also means that to get a really accurate measure of an individual's span, he must be given a large number of tests and the results of these tests must be treated in a special statistical fashion. However, those psychologists who have most occasion to estimate memory span—the administers of "intelligence tests"—cannot spare the time required for a precise estimation, and contrive to use an approximation which involves much less effort. The method is simple. The experimenter has a number of standard lists of, say, digits which vary in length from two digits to ten digits, e.g. 39418 or 4538217069. These are two or three different lists of each length and the subject is told: "I am going to say numbers and, when I have finished, I want you to repeat the numbers in the same order." Starting with one of the shortest lists, the experimenter reads it out at a uniform rate of one digit per second and the subject must try to repeat this list. Progressively longer lists are then given until a length of list is reached on which there is complete failure. The span is taken as the longest list ever repeated correctly. Memory span determined in this way agrees fairly closely with that determined by more time-consuming methods, except that it tends to be slightly lower than the latter.

    Even with such a simple aspect of memorizing as the memory span, it is found that a large number of variables are at work in influencing a person's performance. The span varies slightly with the rate at which the items are presented and is increased if the material is presented rhythmically rather than at a steady rate. Span is impaired by fatigue, there being evidence to suggest that, with school children and students. It shortens slightly but fairly steadily as the working day progresses from morning to evening. Span is also impaired by distraction, the drinking of alcohol, and the smoking of tobacco.

(472 words)

11. As far as memory span is concerned, which of the following is true according to the text? ( )

(a) The first experimental study of memory span was conducted by a Greek doctor.

(b) Once memory span is measured as such, it will remain unchanged.

(c) The test of memory span has to be conducted in a rather complicated manner.

(d) Memory span like other psychological performances may vary for the same person.

12. To get an accurate measure of a person's memory span, ________.   ( )

(a) a few tests are enough for analysis

(b) plenty of tests should be conducted

(c) approximation is not workable

(d) psychologists must conduct several tests without any estimation

13. When the test is conducted, ________.  ( )

(a) it goes on from the shorter lists to the longest list ever designed by the experimenter

(b) it starts with shorter lists to the longest list that fails the subject completely

(c) the subject should repeat the lists on which the length of digits vary from one to ten digits

(d) the subject should read after the experimenter one number after another

14. In the author's view, comparatively speaking, memory span determined by approximation ________.   ( )

(a) is not scientific

(b) takes more time and effort

(c) is not much different from that by other methods

(d) is as accurate as that by other methods

15. Which of the following is Not mentioned as a variable that would affect a person's performance in a memory span test?   ( )

(a) The rate of presenting the numbers.

(b) Fatigue.

(c) Drinking and smoking.

(d) The experimenter's appearance.

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