阅读理解。 Sam is very good at school, but he is not clean. His face and hands are often dirty. He washes them with water only. He does not use soap (香皂). Sam has an uncle. One day the uncle goes to see him. He looks at Sam and says,'Sam, I know what you eat for breakfast this morning.' 'What?' Sam looks at his uncle and says. 'Eggs.' says his uncle.'Your face and mouth tell me that.' 'You are wrong, uncle.' says Sam.'Not today or yesterday, but the day before yesterday!' 1. Who's Sam? A. He's English. B. He's a student. C. He's a young pioneer. D. He's a teacher. 2. What's the Chinese for ' dirty'? A. 高兴的 B. 干净的 C. 个子高的 D. 脏的 3. Where does the uncle live? A. In the same house. B. In different houses. C. In a factory. D. On a farm. 4. When did Sam eat the egg? A. This morning. B. Yesterday. C. Tomorrow. D. The day before yesterday. 5. Which of these is not wrong? A. Sam washes his face and hands every day. B. The uncle thinks the boy eats eggs this morning. C. Sam doesn't like eggs at all. D. Sam doesn' t know his uncle.