题目内容：

People do not analyze every problem they meet. Sometimes they try to remember a solution from the last time they had a ____ problem. They often accept the opinions or ideas of other people. Other times they begin to act without _____; they try to find a solution by trial and error. ____, when all these methods _____, the person with a problem has to start analyzing. There are six _____ in analyzing a problem.

First the person must recognize that there is a problem. For example, Sam’s bicycle is broken, and he cannot ride it to class as he usually does. Sam must ____ that there is a problem with his bicycle.

Next the thinker must _____ the problem. Before Sam can repair his bicycle, he must know why it does not work. For instance, he must _____ the parts that are wrong.

Now the person must look for _____ that will make the problem clearer and lead to possible solutions. For instance, suppose Sam _____ that his bike does not work because there is something wrong with the brakes. _____, he can look in his bicycle repair book and read about brakes, talk to his friends at the bike shop, or look at his brakes carefully.

After ____ the problem, the person should have _____ suggestions for a possible solution. Take Sam as an example_____, his suggestions might be: tighten or loosen the brakes; buy new brakes and change the old ones.

Eventually one _____ seems to be the solution ____ the problem. Sometimes the final idea comes quite ____ because the thinker suddenly sees something new or sees something in a ____way. Sam, for example, suddenly sees that there is a piece of chewing gum(口香糖)stuck to a brake. He _____ hits on the solution to his problem: he must clean the brake.

Finally the solution is ____. Sam does it and finds that afterwards his bicycle works perfectly. In short, he has solved the problem.

1.A. serious         B. usual           C. Common        D. similar

2.A. thinking        B. practice         C. understanding    D. help

3.A. Besides         B. Instead          C. Otherwise        D. However

4.A.  work          B. fail             C. change          D. develop

5.A. ways           B.stages            C. conditions       D. orders

6.A. explain         B. prove            C. see             D. show

7.A. find            B. judge            C. describe        D. face

8.A. determine       B. check           C. correct          D. recover

9.A. answers         B. skills            C. information      D. explanation

10.A. hopes         B. decides          C. argues          D. suggests

11.A. In other words  B. Once in a while   C. At this time       D. First of all

12.A. discussing      B. settling down     C. comparing with    D. studying

13.A. extra          B. several           C. enough          D. countless

14.A. again          B. secondly         C. also             D. alone

15.A. suggestion      B. conclusion       C. decision          D. discovery

16.A. with           B. to               C. into             D. for

17.A. unexpectedly   B. late             C. clearly           D. often

18.A. simple         B. quick            C. different         D. sudden

19.A. fortunate       B. easily           C. immediately      D. clearly

20.A. recorded       B. tested           C. competed        D. accepted