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 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 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 (抱怨) about the long drives to work,       drove for hours at a time when they first     their driver’s license (执照)? 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 become as boring as the jobs they         . And, like the child in January, they go searching for new         .

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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