If all this disappoints you, it shouldn’t．“The brain changes throughout our lives according to what we do with it．” says a biologist．63. The passage mainly tells us ________．

　　Athe difference between men’s and women’s brains

　　B. the changes in brain throughout our lives

　　C. that men are better at spatial tasks

　　D. that brain differences are related to our ancestors

　　64. Which of the following is true according to the first paragraph?

　　A. Women’s grey matter is 10% less than men’s.

　　B. Grey matter plays the same role as white matter．

　　CGrey matter controls thinking in the brain．

　　DBoth sexes have the same amount of white matter．

　　65Which of the following do you agree with according to the fourth paragraph?

　　A. Young boys may be stronger than young girls．

　　BMore women take up jobs requiring speech skills.

　　C. Women may have stronger feelings than men．

　　DOur ancestors needed more spatial skills．

　　66What is the writer’s attitude in writing this passage?

　　A. Defensive.

　　B. Persuasive. C. Supportive． DObjective.

　　D

　　Humankind has tried to improve its standard of living since the very beginning of civilization． Back then, as well as today, providing food and security was the basic task for a person． However, nowadays the range of required goods has expanded significantly．People feel the need for not only some primary things, such as a piece of bread and a roof over their heads, but also for various facilities and luxuries．Providing humanity with these things is connected to the use of natural resources, which requires energy．In turn, the common sources of energy we use today cause pollution, so economic growth is almost inevitably(必然地) associated with environmental damage．

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