Karen, Judy and I were the last ones back in the school room after lunch and all of the other sixth graders were already playing outside.

   "Wow! How ___41___ it would be to write on the blackboard while everyone is ___42___." Judy said.

   "But Mrs. Eiffler doesn't want us writing on the ____43______," I responded.

   "Janet, everyone is outside. No one will ever ___44____," said Karen, reaching into the box and drawing out a piece of ____45____. Judy also began drawing.

   I reluctantly (勉强地)___46_____ my friends, but afraid of being __47____. Then Judy had an idea. " We're all right-handed. Let's see who can write their ___48_____ best using their left hand."

   Judy and Karen started ____49____.I chose a piece of white chalk from the box and wrote my name.

    "We'd better get this board cleaned off ____50____Mrs. Eiffler comes back." said Judy, eying the clock. She picked up a(n) ___51____ and began erasing our names from the board. ___52____ came off but my name.

    I ___53____ looked at the white chalk I used and found it wasn't chalk at all, but a white crayon(蜡笔)! My knees felt ___54____. Hurriedly, we tried many ways, but my name still ____55___. At last, Karen got a knife and scraped it. It ___56_____ finally, but we left an abrasion(磨损处) on the blackboard.

    As the bell rang, the teacher walked in soon.

    Mrs. Eiffler never asked about the abrasion and maybe never ___57____ it. But I did. Every time I walked past the blackboard, I ___58____.

    Although over forty years have passed since the event, I still remember the lesson. " No one will ever know" is never ___59_____. Even if no one else found out, I myself knew. Sometimes living with a ___60____ conscience is punishment enough.