It' s four fifty. School is over. Li Ming and Wang Ying are walking home. On the way they see a boy. He is crying.
"What' s wrong? " Li Ming asks.
"My ball is in that hole. I can' t get it out."
"Don' t worry. We can help you."
They try to take the ball out, but the hole is too deep. They think and think, and then Li Ming has an idea. He says, "We can use water."
They get some water and fill the hole with it. Then the ball comes up. Wang Ying gives the ball to the boy. The boy smiles and thanks them for their help.