用方框中所给词语的适当形式填空，每词限用一次。

open, story, gift, hear, sing, invite, wonderful, rich, at once, wake up

You may know the song Happy Birthday very well. But do you know who it first? It was written by a poor American girl. And now she has become a very   woman.
When she was a child, once she  to her friend’s birthday party. She was pleased but also sad because she didn’t have enough money to buy a gift for him. Later that night she was in bed, worrying about the gift when the door    and in came her grandma. “What happened?” her grandma asked. Hearing the girl’s   , she said, “Don’t worry. I think I can help you. How about singing a song? Happy birthday to …” What a beautiful song! She sang and sang. Suddenly she    . It was a dream! She decided to write it down     and sing it to her friend at the party.
When she sang the song at the party the next day, her friend was very happy . “How     you sing! It is the most beautiful song that I have ever   before! Thank you for giving me the special   !” he said. And they learnt to sing it together. Later the girl became well-known in Americ