Which is more useful?(有用的)
    Thomas is in Grade Two now. He goes to school from Monday to Friday. After school he must do some housework. He helps his parents on the farm(农场) on Saturdays and Sundays. So he doesn't have any time to play soccer in the daytime. He often plays soccer with his friends in the moon (月亮).
    It's five in the afternoon. School is over. Thomas goes home and cooks for his family. After dinner he sees his friend Paul near his house and asks him to play soccer. The boy looks at the sky and sees the moon. Then he asks,” Which is more useful, the sun or the moon?”
    “I think the moon is,”says Thomas. “We need light (光线) in the evening, because we see not the sun, but the moon!”