听对话,回答问题。 1. What is the first word the baby tried to say? A. Truck. B. Luck. 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 shouted that word at the airport? A. He corrected the baby. B. He hid himself somewhere. C. He tried to stop the baby.