A boy，who lived with his mother alone，was born without ears. Although he had no trouble with hearing1 since he was little because of his looks.
Things were different as the boy started school. He was found pretty 2 in both math and music，so he became very popular with his classmates. Right before he went to college，his mother and doctors had discussed 3 could be done to help him make a fresh change. The doctors said they could transplant（移植）a pair of ears4 someone was willing to donate for this young man.
One day，his mother said，"The doctors and I have found someone who would make the sacrifice（牺牲）5 . "The operation（手术） was a great 6 ，and a new person was born. He then made fantastic achievements in college，got married and led a happy life. However，he 7 asking his mother who had offered him the ears. His mother only replied， "The agreement says it's not time to tell 8 yet. "
Years later，before saying goodbye at his mother's funeral（葬礼），he stepped closer and was shocked to find that there were no9 there. With tears，he said to himself， "Mother's hair was very beautiful . She never had it 10 short，so no one has noticed any change on her. "
