公共英语三级题库/阅读理解Section D

    There are two factors which determine all individual’s intelligence. The first is the sort of brain he is born with. Human brains differ considerably, some being more 1 than others. But no matter how good a brain he has to begin with, all individual will have a low order of intelligence he has opportunities to learn. So the second factor is what happens to the individual—the sort of 3 in which he is reared.
  The importance of environment in determining all individual’s intelligence can be 4 by the case history of the identical twills, Peter and Mark. Being identical, the twins had identical brains at 5 . and their growth processes were the same. When the twins were three months old ,their parents died, and they were placed in 6 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 7 . He was read to as a child, sent to good schools, and given every opportunity to be 8 intellectually. This environmental difference continued until the twins were in their late teens, when they were given tests to measure their 9 . Mark’s LQ. was 125, twenty-five points-higher than the average and 10 forty points higher than his identical brother. Given equal opportunities, the twills, having identical brains, would have tested at roughly the same level.
[A] separate     [B] stimulated    [C] smart
[D] unless      [E] when       [F] fully
[G] birth       [H] improved     [I] environment
[J] clearly      [K] demonstrated   [L] similar
[M] intelligence   [N] capable      [O] college

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                      参考答案: M,F,O,A,G,D,N,B,K,I