题目内容：

As a general rule, all forms of activity lead to boredom when they are performed on a routine (常规) basis. As a matter of fact, we can see this ______ at work in people of all ______. For example, on Christmas morning, children are excited about ______ with their new toys. But their ______ soon wears off and by January those ______ toys can be found put away in the basement. The world is full of ______ stamp albums and unfinished models, each standing as a monument (纪念碑) to someone’s ______ interest. When parents bring home a pet, their child ______ bathes it and brushes its fur. Within a short time, however, the ______ of caring for the animal is handed over to the parents. Adolescents (青少年) enter high school with great ______ but are soon looking forward to ______. The same is true of the young adults going to college. And then, how many ______, who now complain about the long drives to work, ______ drove for hours at a time when they first ______ their driver’s licenses? Before people retire, they usually ______ to do a lot of ______ things, which they never had ______ to do while working. But ______ after retirement, the golfing, the fishing, the reading and all of the other pastimes(消遣) become as boring as the jobs they ______. And, like the child in January, they go searching for new ______.

1.A. principle    B. habit    C. way    D. power

2.A. parties    B. races    C. ages    D. countries

3.A. working    B. living    C. going    D. playing

4.A. interest    B. confidence    C. anxiety    D. sorrow

5.A. extra    B. same    C. funny    D. expensive

6.A. well-organized    B. colorfully-printed    C. newly-collected    D. half-filled

7.A. passing    B. broad    C. different    D. main

8.A. silently    B. impatiently    C. gladly    D. worriedly

9.A. burden    B. promise    C. right    D. game

10.A. courage    B. calmness    C. excitement    D. confusion

11.A. graduation    B. independence    C. responsibility    D. success

12.A. children    B. students    C. adults    D. retirees

13.A. carefully    B. eagerly    C. nervously    D. bravely

14.A. required    B. obtained    C. noticed    D. discovered

15.A. need    B. learn    C. plan    D. start

16.A. great    B. strange    C. difficult    D. correct

17.A. time    B. money    C. skills    D. knowledge

18.A. only    B. well    C. even    D. soon

19.A. lost    B. chose    C. left    D. began

20.A. pets    B. toys    C. friends    D. colleagues