（改编）
think,  grow, begin , take , rain , turn,    get
One day, a little boy and his father went out after supper. While they    a walk in the park,，it suddenly  57 to rain. They didn’t have raincoats, so soon they  very wet. The little boy felt unhappy.
While they were walking home in the rain, the boy thought of something. Then he turned to his father and     asked,“ Why does it rain? Do you think it is nice? ”
“ It isn’t nice, I think. But it’s useful,” answered his father.“It rains to make flowers and vegetables__for us ,and make the grass grow for cows and sheep. ”
The boy about this for a few minutes, and then he said, “Then why does it rain on the road too, daddy?”