Lily was a cheerful girl. She always had a big smile on her face. One day，she 1 an old man，Grumble，sitting beside a river. The old man looked sad. Lily wanted to make him smile，so she walked up to him with a friendly greeting. "Good morning，Mr. Grumble! 2 the long face?" she asked.
Grumble said，"What's there to be happy about，young one?Life is full of troubles. "Lily laughed and replied，"Troubles are like big and 3 thunderclouds（雷雨云），Mr. Grumble. But just like clouds，they pass，making way for the sun to shine again. You 4 try looking on the bright side!"
Lily made a bet（打赌）with Grumble，saying，"I bet I can make you smile by the end of the day. "Grumble agreed with her，"You're welcome to try，5 it won't be easy. "
For the rest of the day，Lily did all kinds of funny and silly things to 6 Grumble could laugh. She told jokes，sang like nobody was watching，and even made faces. However，Grumble was still unhappy 7 her. As the sun began to set，Lily decided to give it one last try. She took a deep breath and broke into a joyous dance.
Surprisingly，Grumble couldn't help it. He let out a chuckle（咯咯笑），and then 8 . Before he knew it，he was laughing heartily，his sadness giving way to happiness. Lily won the bet，but more 9 ，she showed Grumble that becoming cheerful was not difficult.
Happiness is a 10 . We can find it when we choose to see the brighter side of life.
