People do not analyze every problem they meet. Sometimes they try to remember a solution f

People do not analyze every problem they meet. Sometimes they try to remember a solution from the last time they had a   21  problem. They often accept the opinion or ideas of other people. Other times they begin to act without   22 ；they try to find a solution by trial and error.   23  .，when all of these methods   24  ，the person with a problem has to start analyzing. There are six    25  in analyzing a problem.
   26  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 see that there is a problem with his bicycle.
Next the person must   27   the problem. Before Sam can repair his bicycle, he must know why it does not work. For example, he must determine the parts that are wrong.
Now the person must look for   28  that will make the problem clearer and lead to    possible solutions. For example, suppose Sam   29   that his bike does not work because there is some thing wrong with the brakes(刹车).   30  , he can look in his bicycle repair book and read about brakes,   31  his friends at the bike shop, or look at his brakes carefully.
After studying the problem, the person should have   32  suggestions for a possible solution. Take Sam as an example   33 ，his suggestions might be: tighten or loosen the brakes; buy new brakes and change the old ones.
In the end, one   34  seems to be the solution to the problem. Sometimes the     35     idea es quite   36  because the thinker suddenly sees something new or sees something in a   37   way. Sam, for example, suddenly sees there is a piece of chewing gum（口香糖）stuck to a brake. He   38   finds the solution to his problem ：he must    39    the brake.
Finally the solution is tested .Sam finds that his bicycle   40  perfectly. In short he has solved the problem.
【小题1】A．funnyB．usualC．similarD．mon【小题2】A．practiceB．thinkingC．understandingD．help【小题3】A．BesidesB．InsteadC．OtherwiseD．However【小题4】A．failB．workC．changeD．develop【小题5】A．chancesB．conditionsC．stepsD．troubles【小题6】A．FirstB．UsuallyC．In caseD．Most importantly【小题7】A．demandB．findC．describeD．face【小题8】A．imaginationB．dutyC．programD．information【小题9】A．hopesB．arguesC．decidesD．suggests【小题10】A．In other wordsB．Once in a while C．By chanceD．At this time【小题11】A．apply forB．turn toC．agree withD．look after【小题12】A．extraB．enoughC．severalD．countless【小题13】A．suddenlyB．againC．eitherD．alone【小题14】A．suggestionB．conclusionC．decisionD．discovery【小题15】A．nextB．clearC．finalD．new【小题16】A．unexpectedlyB．lateC．clearlyD．often【小题17】A．simpleB．differentC．quickD．sudden【小题18】A．fortunatelyB．easilyC．clearlyD．immediately【小题19】A．cleanB．separateC．loosenD．remove【小题20】A．arisesB．worksC．takesD．declaresC