题目内容：

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，选出可以填入空白处的最佳选项。

When you concentrate, you focus on one thing and get other thoughts out of your mind. You concentrate on schoolwork, on sports, or on some music which requires serious ________effort. The point is that you think of only one________at a time, do it and leave it behind you.

________to concentrate is important. Any adult will tell you they________have at least a dozen things on their minds. When they must complete a project by a certain day and hour, they concentrate on it and________several people into a work team. This________a clear focus on the work—and on getting others to do their________.

Adults have a(n) ________life which may include a husband or a wife, children, and all the work of running a household. Supper must be________and the broken back staircase must be fixed before someone gets________. If a child is sick, he or she must go to the________.

With all these things on their minds, how do adults________the day? They know they cannot fight all their battles at one time, so they concentrate on the most ________task, get it done, and go onto the next.

The martial arts (武术) ________ you this kind of concentration. To do a movement________, you must watch and imitate the master. Since you do not always get things right the first time, you must figure out your________and correct it. The instructor is there to________, but you are still responsible for your personal progress. As you move up in rank (等级), more and more is demanded of you. The________are increasingly complex. You have ________time in class and want to get the most from it. But since you have learned to concentrate on________movements and get them right, you confidently accept—and meet—these greater challenges.

1.A. technical   B. political      C. mental      D. social

2.A. opinion      B. person         C. question    D. task

3.A. Learning     B. Agreeing      C. Promising    D. Preparing

4.A. sometimes    B. always         C. hardly       D. probably

5.A. organize    B. order         C. send        D. divide

6.A. offers       B. changes       C. adjusts     D. requires

7.A. lesson       B. favorite       C. best         D. favor

8.A. city         B. home          C. country      D. art

9.A. sold        B. eaten          C. cooked       D. bought

10.A. hurt       B. cheated       C. punished     D. beaten

11.A. professor   B. movie          C. class        D. doctor

12.A. refer to    B. dream of       C. get through D. hope for

13.A. pleasant    B. hopeful       C. difficult   D. urgent

14.A. teach       B. lend           C. leave       D. spare

15.A. quickly     B. correctly     C. carefully    D. graciously

16.A. mistake    B. pain           C. disadvantage D. regret

17.A. practice    B. pay            C. watch        D. help

18.A. ideas      B. cultures      C. movements    D. situations

19.A. fixed       B. limited        C. appointed    D. wasted

20.A. direct      B. simple         C. smart        D. Wise