听对话，选择正确答案。每组对话读两遍。 1. Where are Sam and his mother? A. At school. B. At home. C. In a food shop. 2. What's Sam's favorite food? A. Chicken sandwiches. B. Vegetable sandwiches. C. Bread and milk. 3. What does Sam's mother ask him to do before eating? A. Wash his face. B. Wash his hands. C. Clean his teeth. 4. What's Sam's dad doing now? A. He's going to the station. B. He's sleeping. C. He's working. 5. Why did Sam's dad go to bed late last night? A. He went to the train station to meet his friend. B. He wrote to his friend till late last night. C. He couldn't find the way to the train station last night.