二、完形填空（共15小题；每小题2分，满分30分）
Have you ever heard the story of the four-minute mile? For years people believed that it is impossible for a human being to 16 a mile in less than four minutes until Roger Banister proved it 17 in 1954．Within one year, 37 runners 18 the belief barrier（障碍）．And the year after that, 300 other runners did the same thing．
What happens if you put an animal in a 19 ? Any animal, big or small, will swim its way through．What happens when someone, who does not know how to swim, falls in deep waters? You 20 ．If an animal who has not learned swimming could 21 by swimming, why not you? Because you believe you will drown while the animal does not．
These 22 show the power of beliefs．There is no other more 23 force in directing human behavior than belief．Our beliefs have the power to 24 and to destroy．
In a way it is our beliefs that determine how much we’ll be able to 25 our potential．So pay attention to some of your 26 ．Do you believe you are weak in mathematics? Do you believe that other people dislike you？Do you believe life is full of 27 ？
Belief is not 28 , however．It’s nothing but the generalization of a past incident．As a kid, if a dog bit you, you believed all dogs to be 29 ．To change certain behavior, identify the beliefs associated with it．Change
