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)

A. Unique descriptive skills.
B. Good knowledge of readers' tastes.
Colorful world experiences.
D. Careful plotting and clueing.