B

A student stuck a note on his classmate's back while theywere atrecess(课间休息)one day.The note said‘I'm Stupid".He asked therest of his classmates not to tell the boy.The other students startedlaughing at the boy,but wouldn't say why.
Soon,it was time for their afternoon math class.Their teacherwrote a difficult problem on the blackboard.No one was able to solve itexcept.the boy with the note on his back.
Ignoring the laughter,he walked toward the blackboard and solvedthe problem.The teacher asked the class to clap (for him andtook the note off his back.She told him,"It seems that you didn't knowabout the note your classmate put on your back,but you didn't seem tocare anyway.'
Then the teacher looked at the rest of the class and said,"Before Ipunish you all,let me tell you two things.First,all of you will be labeled(贴标签)at one point or another by other people who don't wantyou to succeed.All you have to do is ignore these labels.You have tocake every chance you have to learn,grow and improve."
"And it seems that none of you are triends with this boy,sincenone of you were kind enough to tell him about the note.If that's true,then you'd better hope that you have some good friends yourself.
Otherwise(否则)，you might be the one with a note stuck on your backsomeday with no one to tell you.