Jim lives in a city with his wife. He is a police officer. He works in a police station. It is not far from his home, so he goes to work on foot every day. His wife is a worker. She works in a factory. It's far from her home, so she goes to work by car. When she drives the car, she is very careful. When the light is red, she stops. When the light is yellow, she waits. She won't go until the light is green. She always says that we must obey(遵守) the traffic rules.
