Alittleboyinvitedhismothertothefirstparentmeetingofhisprimaryschool．Tohissurprise，shesaidshewouldgo．Thiswouldbethefirsttimethathisclassmatesandteachersmethismother．Shewasnotabeautifulwomanbecauseofher

　　A little boy invited his mother to the first parent meeting of his primary school．To his surprise，she said she would go．This would be the first time that his classmates and teachers met his mother．She was not a beautiful woman because of her scar （伤疤）．His mother told him there was the scar when she was born．

　　At the meeting，other people were impressed by the kindness and natural looks of his mother，but the little boy felt embarrassed for his mom's looks，and hid himself behind others．Just at that time，he heard the conversation between his mother and his teacher．

　　"How did you get the scar on your face？"the teacher asked．

　　The mother replied，"When my son was a baby，his room caught fire one day．①Everyonewastooafraidtogetintotheroom．I rushed into it in a minute．While I was running towards his bed，a beam （横梁） fell down and I placed myself over him to protect him．I was knocked and I knew nothing．Luckily，someone saved us．"She touched the burned side of her face．"But I have never regretted （后悔） doing what I did．"She added．

　　Having heard that，the little boy was so moved that he hugged（拥抱） his mother with tears in his eyes．He held mother's right hand tightly（紧紧地） for the rest of the day．

　　71．Why was the little boy's mother not beautiful？___

　　72．When the little boy's mother agreed to take part in the first parent meeting．The little boy felt___．

　　73．将画线处译成汉语：___

　　74．When a beam in the little boy's room fell down，what did his mother do？___

　　75．What did the little boy do for the rest of the day？___．