阅读下面短文，从短文后各题所给的四个选项（A, B, C, D）中，选出可以填入空白处的最佳选项.

As a general rule, all forms of activity lead to boredom when they are performed on a routine basis. As a matter of fact, we can see this1at work in people of all2. For example, on Christmas morning, children are excited about3with their new toys. But their4soon wear off and by January those5toys can be found put away in the basement. The world is full of6stamp albums and unfinished models, each standing as a monument to someone's7interest. When parents bring home a pet, their child8bathes it and brushes its fur. Within a short time, however, the9of caring the animal is handed over to the parents. Adolescent enter high school with great10but soon looking forward to11. The same is true of the young adults going to the college. And then, how many12, who complain about the long drives to work,13drove for hours at a time when they first14their drivers licenses? Before people retire, they usually15to do a lot of16things, which never had17while working. But18after retirement, the golfing, the fishing , the reading and all of the other pastimes become as boring as the jobs they19. And, like the child in January, they go searching for new20.

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

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

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

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

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

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

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

8．	A． silently B． impatiently C． gladly 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． 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． start D． plan

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． choose C． left D． quit E． F． G． H． A．pets B．toys C．friends D．colleagues