14. Mr. Green is not old, but he doesn't have much hair. His wife Annie has beautiful thick (厚的) black hair. They have a daughter Ruth. She is four years old.
There is a photo of Mr. Green in the living room. One day, Ruth looks at it for a long time and says to her mother, "Mom, why does Dad have so little hair?
Annie laughs and says, "He has very little hair because he thinks a lot. He is a clever man. "
Ruth looks at her mother's thick black hair for a few seconds, and then she asks, "Mom, why do you have a lot of hair?"