Problem: M: Yes. It explains how science will revolutionize the 21st century. W: Could I ask you some questions concerning the book? M: Sure. W: Are you optimistic about the future? M: Generally, yeah. If we go back to the year of 1900, most Americans didn't live beyond the age of 50. Since then, we've had improvements in health care and technology. There is no reason why these won't continue far into the 21st century. W: Are we ready for the changes that will come? M: Changes are already happening. The future is here now. We have DNA, microchips, the internet. Some people's reaction is to say, we are too old; we don't understand new technology. My reaction is to say, we must educate people to use new technology now. W: Is world population going to be a big problem? M: Yes, and no. I think that world population will stop increasing as we all get richer. If you are a part of the middle class, you don't want or need 12 children. W: Will there be a world government? M: Very probably. We will have to manage the world and its resources on a global level because countries alone are too small. W: Will we have control of everything? M: I think we'll learn to control the weather, volcanoes and earthquakes. Illness won't exist. We'll grow new livers, kidneys, hearts, and lungs like spare parts for a car. People will live to about 130 or 150. For 2000 years, we have tried to understand our environment. Now we'll begin to control it. What was said before this conversation?

A: W: Hi, Professor Smith. I hear you've written a book titled Visions.
Problem: Given the question: M: Why? Because I was almost killed. Some awful driver hit the back wheel of my bicycle and sent me onto the pavement. W: Oh, my God! Are you hurt? M: No, fortunately I'm fine. W: Thank goodness for that! What was said before this conversation?
++++++++++++++++++++++++++++++++
The answer is:
W: Why on earth are you so late? I've been waiting for more than half an hour!
input question: M: No, thank you. I guess that's it. By the way, in case there's a flaw in this CD player. Can I return it? W: Yes. But you must return it within 30 days. M: Is there a charge for that?I know other stores have a restocking fee. W: There will be no charge at all. M: I'm glad to hear that. W: However,you must show us the receipt. Could you sign it here, please? M: OK. W: All right. Keep your receipt. If something comes up. you can show it to us and We'll give you a refund. M: Thanks. I'll put it in a safe place. What was said before this conversation????
output answer: W: Is there anything else that you would like to buy?
M: Good morning, Miss Green. What's wrong? Where are you? W: I am at home. I'm ill. I'm afraid I've got a terrible cold and a bad headache. M: I'm very sorry to hear that. Well, you'd better stay at home. W: Thank you, Mr Baker. See you tomorrow. M: See you tomorrow. Goodbye. W: Goodbye, Mr Baker. What was said before this conversation?
----
Answer: W: [Mr Baker is very happy to see Miss Green every morning because she is a good secretary. One Monday Miss Green didn't come to work because she was ill. She had a terrible cold and a bad headache, so she phoned Mr Baker.] [The telephone rings.] Good morning, Mr Baker.
Q: W: I'm afraid I may have to hang up. I don't have any more coins and the line will be cut soon. What was said before this conversation?
A: M: Please hold the line, Mrs. Smith. The doctor will talk to you in a minute.
[Q]: M: I want to order a laptop computer for my wife. W: Certainly. What type would you like to buy for her? M: AM520. W: What color does she want, a black one or a white one? M: She prefers a black one. W: All right. Have you decided what size to buy? There are different sizes to choose from, from 13-inch ones to 17-inch ones. M: Well, I want to buy a 15-inch one. How much does it cost? W: 5000 yuan, including the postage. What was said before this conversation?
****
[A]:
W: Hello, this is Dell China. What can I do for you?