听力原文：W: When you write a novel, do you know where you're going, Dr. James? M: Yes, you must, really. If you're writing the classical detective story, because it must be so carefully plotted and so carefully clued. I have schemes. I have charts. I have diagrams. It doesn't mean to say I always get it right, but I do plan before I begin writing. But what is so fascinating is how a book changes during the process of writing. It seems to me that creative writing is a process of revelation, really, rather than of creativity in the ordinary sense. W: When you're planning the basic structure, do you like to go away to be sure that you're by yourself? M: I need to be by myself certainly, absolutely. I can't even bare anybody else in the house. I don't mind much where I am as long as I' ve got enough space to write, but I need to be completely alone. W: Is that very important to you? M: Oh, yes. I've never been lonely in all my life. W: How extraordinary! Never? M: No, never. W: You're very lucky. Someone once said that there's a bit of ice at the heart of every writer. M: Yes. I think this is true.The writer can stand aside from experience and look at it, watch it happening. There is this 'detachment' and I realize that there are obviously experiences which would overwhelm everyone. But very often, a writer can appear to stand aside, and this detachment makes people feel there's a bit of ice in the heart. 19. Q: What is the key to write a good classical detective story according to the man? 20. Q:What does the man mainly need when working on a book?. 21. Q:What does the man say about writers? (24)