短文理解。 1. Mary Smith wanted to become a teacher because . [     ] A. she liked teaching B. she liked school life C. she liked children 2. The children enjoyed her teaching because . [     ] A. she was very young B. she was experienced C. she laughed a lot. 3. Why did Helen know a man's hair become gray before his beard (胡须)? [     ] A. Because she saw it happened to her father. B. Because her father told her about it. C. Because the other children told her about it. 4. From this story we know . [     ] A. Helen was a clever girl. B. children were free to ask questions in Mary's class C. the boy was foolish. 5. What would the children do after the boy answered the question? [     ] A. They would say yes to him. B. They would say no to him. C. They would laugh again.