One day the traffic was heavy on the city roads.The cars were endless.It seemed to be hopeless to walk across the street.It was useless for us to wait and see.So we decided to walk over the footbridge.My daughter was cheerful in her colourful dress.She always thought that life was meaningful and wonderful .But to her surprise,she found that a 3-year-old boy was begging on the footbridge.He looked so helpless .Why doesn’t he go back home?She asked.I didn’t know how to answer it.