请听一段对话,回答第1至第3小题。 1. Who is Mr Smith? A. He's Miss Lin's friend. B. He's Miss Lin's classmate. C. He's a science teacher. 2. What does Tom want to borrow from Miss Lin? A. He wants to borrow a VCD. B. He wants to borrow a book. C. He wants to borrow a magazine. 3. What do Tom's classmates think about the life on Mars? A. They think it very interesting. B. They find it a little boring. C. They hope they could go to Mars.