The teacher stood before his class and was going to hand out the final exam papers. “I know how __1__ you have all worked to prepare for this test，” he said. “And because I know you can do it well, I am willing to offer a B to anyone who would __2__ not to take the test.    Many students jumped up to __3__ the teacher and left the classroom. The teacher looked at the __4__ students and said, “Does anyone else want to get a B、 this is your last __5__.” Two more students decided to go.    Seven students remained. The teacher then handed out the __6__. There were only three sentences typed on the paper: Congratulations! You have just __7__ an A in this class. Keep believing in yourself.    I never had a teacher like that, but I think it is a test __8__ any teacher could and should give. Students who are not __9__ in what they have learned are B students at best(充其量)．    The same is __10__ in real life. The A students are those who believe in what they are doing because they have __11__ both successes and failures. They have learned life’s lessons, either from normal education __12__ from events in their lives, and have become __13__ people.    Scientists say that by the age of eight, 80% of what we believe about ourselves has already been formed. You are a big kid now, and you __14__ that you have some limits (限制). However, there is __15__ you can’t do or learn or be. Sir Edmund Hillary, the first person to reach the summit of Mount Everest said, “It’s not the mountain we conquer(克服) but ourselves. (2011十堰)    语篇解读：本文通过讲述一位老师测试学生的自信心的故事，告诉我们自信是前进的动力。