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brakes, ___14___ his friends at the bike shop, or look at his brakes carefully. After ___15___ the problem, the person should have __16____ suggestions for a possible solution. Take Sam as an example ___17___, his suggestion might be: tighten or loosen the brakes, buy new brakes and change the old ones. In the end, one ___18___ seems to be the solution ___19__ the problem. other words in a while of all this time for to with on down with √ √ √ √ √ √ √ √ √ √ Sometimes the ___20___ idea es quite ___21___ because the thinker suddenly sees something new or sees something in a ___22___ way. Sam, for example, suddenly sees there is a piece of chewing gum(口香糖 ) stuck to a brake. He ___23___ hits on the solution to his problem。 they try to find a solution by trial and error. ___3__, when all of these methods ___4___, the person with a problem has to start analyzing. There are six ___5___ in analyzing a problem. ___6___ 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 ___7___