A little boy invited his mother to his school's first teacher-parent meeting．He never thought that she would agree．But she showed up．He felt worried．Although she was a beautiful woman，there was a scar （疤） that covered nearly the whole right side of her face．
To his surprise，the boy saw other people having a good talk with his mother at the meeting．But he felt sorry for his mother's face and sat in a chair far from his mother．Just at that moment，he heard a talk between his mother and his teacher．
"How did you get the scar on your face？"the teacher asked．She replied，"When my son was a baby，his room caught on fire one day．Everybody was too afraid to go in，so I went in and ran towards his bed．At that time I saw a beam（横梁）coming down and I placed myself over him to try to protect him．I was knocked．But luckily，a fireman saved both of us．"She touched the scar．"This scar will be here forever，but I have never regretted what I did for my son．You see，he is strong and healthy now．"
Hearing that，the little boy ran to his mother with tears in his eyes．He hugged her and held her hand tightly for the rest of the day．
Fill in the blanks according to the passage．Only one word for each blank．
At a boy's first teacher-parent meeting，he never thought his mother would agree to come．But his mother（71） ______ and had a good talk with other people．He was very（72） ______ to see that．He felt sorry because there was a scar on the whole right side of his mother's face．He sat far from his mother．Just（73） ______ ，a talk between his teacher and his mother changed his mind．He learned that the scar on his mother's face was left（74） ______ of saving him and his mother didn't regret doing that．Hearing this，the boy was so moved that he ran to his mother and gave her
A（75） ______ ．