A.

　　To confirm

　　whether your goal is practical.

　　B.

　　To modify

　　your approach from

　　time to time.

　　C.

　　To change our circumstances constantly.

　　D.

　　To learn from

　　our past mistakes.

　　答案及解析：

　　5．B。主旨大意题。在第四段作者建议我们要依据环境调整做事的方法。只有方法得当，才能取得理想的效果。

　　B

　　Everyone becomes a little more forgetful as they get older, but men's minds decline more than women's, according to the results of a worldwide survey.

　　Certain differences seem to be inherent in male and female brains: Men are better at maintaining and dealing with mental images (useful in mathematical reasoning and spatial skills), while women tend to excel (擅长) at recalling information from their brain's files (helpful with language skills and remembering the locations of objects).

　　Many studies have looked for a connection between sex and the amount of mental decline (衰退) people experience as they age, but the results have been mixed.

　　Some studies found more age－related decline in men than in women, while others saw the opposite or even no relationship at all between sex and mental decline. Those results could be improper because the studies involved older people, and women live longer than men: The men tested are the survivors, “so they're the ones that may not have shown such cognitive decline，” said study team leader Elizabeth of the University of Warwick in England.

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