A bus stops at a small bus stop.A man is hungry and he wants to buy some cakes.It's raining hard.He doesn't want to go out in the rain.He sees a boy. “ Come here, boy ” He cries. “ Do you know how much the cakes are?" The boy says, “ Yes."The man gives the four dollars asks him to buy two cakes. "One is for you and the other is for me." Three minutes later, the boy comes back. He's eating a cake. He gives the man two dollars and says, “ Sorry, there is only one cake left ( 剩余的 ). ”