【单选题】听力原文:M: Good morning. W: Good morning. How can I help you? M: I understand that the school organizes...umm, trips to different... W: Yes, we run five every month: three during weekends and two Wednesd...
【单选题】听力原文:W: I don't understand how the inventor earns money from the invention. (19) After all, anyone can copy and sell it. Really, what is a patent? A piece of paper? A philosophy? You can't see it. M: ...