听下面一段对话，完成第1至4题。 1. What is the talk mainly about? A. The history of the school. B. The courses for the term. C. The plan for the day. 2. Where can the visitors learn about the subjects for new student? A. In the school hall. B. In the science labs. C. In the classrooms. 3. What can students do in the practical areas? A. Take science courses. B. Enjoy excellent meals. C. Attend workshops. 4. When are the visitors expected to ask question? A. During the lunch hour. B. After the welcome speech. C. Before the tour of labs.