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

rom the last time they had a【C1】______ problem. They often accept the opinion or ideas of other people. Other times they begin to act without【C2】______ ; they try to find a solution by trial and error. However, when all of these methods【C3】______, the person with a problem has to start analysing. There are six 【C4】______ in analysing a problem.

【C5】______, 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【C6】______ that there is a problem with his bicycle.

Next the person must【C7】______ the problem. Before Sam can repair his bicycle, he must know why it does not work. For example, he must【C8】______ the parts that are wrong.

Now the person must look for【C9】______ that will make the problem clearer and lead to【C10】______ solutions. For example, suppose Sam【C11】______ that his bike does not work because there is something wrong with the brakes. 【C12】______, 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【C13】______ the problem, the person should have several suggestions for a possible solution. Take Sam as an example【C14】______ , his suggestions might be: tighten or loosen the brakes; buy new brakes and change the old ones.

In the end, one【C15】______ seems to be the solution to the problem. Sometimes the final idea comes quite unexpectedly because the thinker suddenly sees something in a different way. Finally the solution is tested. Sam does it and finds his bicycle works perfectly. In short he has solved the problem.

【C1】

A．serious

B．usual

C．similar

D．common