Listen and read the conversation. Pay attention to the highlighted questions. (Nghe và đọc đoạn hội thoại. Hãy chú ý đến những câu hỏi được đánh dấu.) Lan: What does "solar energy" mean? Mr Tan: Well, it's energy that comes from the sun. Lan: And what does "wind energy" mean? Mr Tan: It's another type of energy, and it comes from wind.