题目内容：

完形填空（共1小题）

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

As a general rule, all forms of activity lead to boredom when they are performed on a routine(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．principle      B．habit              C．weaker            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．strong             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．quit

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