回答：What do you often do to make your parents or friends happy?

回答：What do you often do to make your parents or friends happy?
Peter's uncle lived in the country.Once Peter went to stay with him for a few weeks.They often went for a walk or drove in a car.When they passed somebody,his uncle waved.Peter was surprised,and said,"Uncle George ,you know everybody here,Where did you meet them all?"
"I don't know all these people,"said his uncle.
"Then why do you wave to them?"asked Peter.
"Well,Peter,"answered his uncle."When I wave to someone,he is pleased if he knows me.Hegoes on his trip with a happy heart.But when I wave to someone,and he does't know me,and he is surprised and says to himself.'Who is that man?Why did he wave to me?'So he has something to think about during the rest of his trip,ang that makes his trip seem shorter.So I make everybody happy."