请听对话,回答下列问题。 1. What are they talking about? A. A piece of news. B. An astronaut. C. The Mars. 2. What is Amy going to be? A. A dancer. B. An astronaut. C. A scientist. 3. Where are the astronauts from? A. China, and the United States B. China, the United States and Russian C. China and Russian 4. What does Bob prefer, dancing or science? A. Both. B. Science C. dancing.