阅读下面短文，掌握其大意，然后从21~40各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。
When I was a law professor, a student reported that I made an error in grading his exam by giving him too many points. He was          and after thanking him for his honesty, I changed the           in my records. His beaming (欢笑的) face turned to          “You’re lowering my grade?” he said angrily. “I would never have come in           ……”
He didn’t finish the           but it was obvious that his display of honesty was false. He thought he’d have it all—praise and the           grade.
Several colleagues thought I should have let the higher grade stand         all I’d accomplished was to discourage him from being          in the future. And every time I tell this          , some people agree with this remark.
But I can’t see how I could give good           for worsening my mistake in grading by undermining (损害) the honesty of all my grades by failing to           an error. The grade itself would be a dishonest reflection of his           and it would have been          to other students. How could I possibly give a           a gift of an unearned grade?
I know voluntarily reporting an error in one’s favor is          , but, like           extra change, it’s the          thing to do. People with real honesty, hate to give up benefits as mush as anyone else. The difference is that for them a good conscience and reputation is reward enough to give reason for the cost of doing the right thing.
Perhaps          the student’s grade did discourage him from being honest in the future, but bribing (贿赂) him to be honest so that he does the right thing when it’s cost-free would have          him even more. The duty to be honest is          right and wrong, not risks and rewards.

A．wise B．right C．rigid D．angry

A．file B．note C．name D．grade

A．grief B．shock C．happiness D．careless

A．whether B．which C．if D．what

A．sentence B．word C．exam D．lesson

A．higher B．lower C．more D．less

A．such B．because C．so D．whether

A．brave B．adventurous C．honest D．successful

A．man B．story C．way D．exam

A．reason B．cause C．excuse D．result

A．make B．find C．avoid D．correct

A．reaction B．sense C．sign D．knowledge

A．unfair B．cruel C．tough D．funny

A．people B．teacher C．student D．worker

A．active B．often C．unusual D．curious

A．receiving B．returning C．earning D．paying

A．many B．well C．bad D．right

A．lowering B．influencing C．protect ing D．separating

A．ruined B．encouraged C．improved D．blamed

A．in B．after C．about D．during