问题
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| The ups and downs of life may seem unpredictable.But scientists know there are clear __1__ that almost all people share.Even if you've passed your "best", you still have other __2__ years to come. Certain important highpoints come later in life. When are you __3__? From 18 to 25, according to I. Q.scores; but you're wiser and more __4__ with increasing age.At around 30, mental abilities begin to decline, __5__ your ability to do maths.But your ability to complete other tasks __6__.For example, your vocabulary increases over time.At 60, your brain __7__ almost four times as much information as it did at age 21.Because of this, some psychologists suggest that "maturity quotients" (M.Q.) be used to measure intelligence for __8__. When are you happiest? You have the best __9__ sense of yourself from 15 to 24, when you feel energetic all the time.The best professional sense is from 40 to 49.Before age 24, we believe that our happiest years are yet to __10__, but when we are over 30, we believe that they're behind us.After age 30, we're more __11__ and don't view happiness as a goal in itself.If we maintain our health, achieve professional and emotional goals, then __12__, we feel, will follow. When are you most creative? Generally between 30 and 39, but it __13__ with different professions. The highpoints in areas such as science and economics come __14__-most Nobel prize winners did their top research in their 20's and 30's-bu  t for people who keep an active mind, there is no upper age __15__. | ||||
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答案
1-5: CABCD 6-10: ABCCA 11-15: BDBAD