Tim lives in Shanghai with his wife. He is a police officer. He works in a police officer. 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 toy factory. She often goes to work by car. And she drives very carefully. When the light is red, she stops. When the light is yellow, she waits. She won't go until (直到）the light is green. She says we must pay attention to the traffic lights.
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