M r . Dawson was an old man with a bad temper(脾气） . And everyone in town knew it. Kids were afraid to go into his yard to pick apples .
One Friday , 12-year-old Janet and her friend Amy had to walk past M r . Dawson ' s house . When Janet saw him ,she suggested crossing the street to the other side . But Amy said they needn' t .                                                                                                       
When M r . Dawson saw Amy ,he smiled and said , “ hello , Amy ! I see you have a new friend with you today .” Amy smiled back and told him that Janet would stay with her that night . M r . Dawson looked friendly and gave them each a fresh apple . The girls were glad to get them .
Later Janet asked Amy , “ everyone says he is the most unwelcome person in town . Why was he so kind to us ? ” Amy explained that when she first walked past his house , she was also afraid of him . But she pretended there was an invisible ( 看不见的）smile on his face and then started talking to her . Just a “ hello ” at first , and then more .
“ An invisible smile ？”Janet was puzzled ,“ Yes ,” answered Amy , “ My grandma told me to think so . She says smiles can run around . If we keep smiling at someone , sooner or later he will really smile back . ” 
Remember what Amy ' s grandma said ,and we will find that most people can ' t refuse our smile .
What did people feel about M r . Dawson ?
What did Janet think of M r . Dawson after getting an apple from him ?
What did Amy do when she first walked past M r . Dawson ' s house ?
Who did Amy learn “ an invisible smile ” from ?
What does the writer advise us to do ?