| 听下面一段材料，回答第1至4题。 |
| 1. What is the first word the baby tried to say? |
| A. Truck. B. OK. C. Duck. |
| 2. How old was the baby when he learned to say that word correctly? |
| A. About 18 months. B. About 21 months. C. About 24 months. |
| 3. What did the father do when the baby screamed that word at the airport? |
| A. He corrected the baby. B. He tried to stop the baby. C. He hid himself somewhere. |
| 4. Why did the mother pretend not to know the baby? |
| A. She got angry with the father. B. She was frightened by the noise. C. She felt uneasy about the noisy baby. |