—_______

不要担心。

不要横穿马路。

别闯红灯。

别伤心。

不要触摸门。

— Yes, I do.

Tom's grandfather, Mr. Hill is a taxi driver. Mr. Hill likes his job very much. He knows the name of every road and street in the city. He likes helping people. He often helps people from other cities find their way. He is happy to talk with passengers (乘客). He tells them something about his job and the city. He is sixty years old this year. But he looks young. He always says, "I am a happy driver".