阅读下面短文，从短文后所给各题的四个选项(A、B、C、D)中，选出可以填入空白处的最佳选项。

　　Once there was a poor little girl living near a forest．She had no family and no one to love her．So she often 　　1　　 sad and lonely．

　　One day, when she was walking in the forest, she found that a small 　　2　　 was trapped unluckily in a bush．The butterfly tried to fly away 　　3　　 failed．The kind little girl saved the butterfly with great care．Instead of flying away, the butterfly turned 　　4　　 a beautiful fairy(仙女)．The little girl was very 　　5　　．

　　“Thank you for 　　6　　 me．You are so kind．I will make any of your dreams come true．” said the fairy．

　　The little girl thought for a moment and then said, “I want to be 　　7　　!”

　　The fairy said, “Very well．I will help you．” And she said something in the little girl's ear．Then the fairy disappeared．

　　As the kind little girl grew up, she was 　　8　　 ready to help people in need and was popular among the villagers．No one in the village was as happy as she was．Everyone asked her the 　　9　　 of ther happiness．She always smiled and 　　10　　, “The secret of my happiness is that I listened to a kind 　　11　　 when I was a little girl．”

　　When the kind girl became a very old woman and was dying, the neighbours in the 　　12　　 all gathered(聚拢)around her bed because they were 　　13　　 that her secret of happiness would die with her．They asked, “Please tell us what the kind fairy said．”

　　The lovely old woman still 　　14　　 and said, “She told me that everyone needed me, no matter how safe they seemed, no matter how rich or poor, no matter how old or 　　15　　．She said that helping others would make me happy all my life．”

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