完形填空。
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
high-points 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 high-
points in areas such as science and economics come 14 -most Nobel prize Winners did their top research in
their 20's and 30's-but for people who keep an active mind, there is no upper age 15 .

(     )1. A. plans      (     )2. A. good       (     )3. A. best       (     )4. A. powerful   (     )5. A. generally  (     )6. A. climbs     (     )7. A. recognizes (     )8. A. babies     (     )9. A. mental     (     )10. A. come      (     )11. A. confident (     )12. A. wealth    (     )13. A. agrees    (     )14. A. early     (     )15. A. demand

B lives         B. strange      B. smartest     B. energetic    B specially    B. stops       B. possesses   B. teenagers    B. emotional  B. last          B. realistic    B. sharpness   B. varies     B. naturally    B. reason

C. patterns         C. interesting   C. most mature   C. experienced     C. mainly         C. matters        C. communicates   C. adults          C. physical      C. remember        C. hopeful        C. wisdom           C. goes         C. unexpectedly    C. choice

D. predictions     D. difficult   D. most skilled    D. satisfied      D. particularly            D. works        D. receives       D. elders         D. personal       D. disappear      D. grateful       D. happiness        D. ends      D. recently      D. limit

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