Seven students remained．The professor closed the door and took attendance．Then he 12 the final exam．There were two sentences typed on the  13  ：

“  14  ，you have just received an A in this class．Keep believing in yourself．”

I  15  had a professor who gave a test like that．It may seem like the easy 16  of grading exams，but it’s a  17  that any teacher in any discipline(治学严谨)could and should give．Students who don’t have  18  in what they’ve learned are B students at best．

The same is  19  for students of real life．The A students are those who believe in what they’re doing  20  they’ve learned from both successes and failures．