【正文】
aster returned, I was looking out of the window. I ________ him what had happened then. It ______ so easy to say: “I’m sorry, but I saw the title for the English Writing Prize on your desk. You’ll have to change it.” The chance passed and I did not take it. I sat the exam the next day and I won. I didn’t mean to cheat, but it was still cheating anyhow. That was thirtyeight years ago when I was fifteen. I have never told anyone about it before, nor have I tried to explain to myself why not. The obvious explanation is that I could not admit I had seen the title without admitting that I had been looking at the things on his desk. But there ______ more behind it. Whatever it was, it has bee a good example of how a little mistake can trap you in a more serious moral corner( 道德困境 ) . A. would have been B. should have told C. would have avoided D. must have been Keys