[Q]: M: Yeah, Laura. I'm going for a ride around the Qinghai Lake on Saturday, but it depends on the weather. W: According to the forecast, it'll be cloudy the day after tomorrow, good for a ride. M: Great! Do you go riding often? W: Absolutely. I go as much as I can, because we can really get in touch with nature. It would be nice to get out of the city. Do you want any company? M: Sure, but it will be a 30-mile ride. Have you been riding so long before? W: Yeah, I go a lot too. I even saw a bear and some monkeys on my last ride. My friend Mike and I rode more than 30 miles to a very wild part of the national forest. M: Wow! You must have been pretty far away from the city. Shall we invite him to go along? W: Of course. I'll ask him. M: Thanks. We will have a good time this weekend. What was said before this conversation?
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[A]: W: Have you any plan for the weekend, Tom?
input: Please answer the following: M: Well, the original shop was opened by a retired printer by the name of Gruby. Mr Gruby being left-handed himself, thought of the idea to try to promote a few products for left-handers. W: And how did he then go about actually setting up the business? M: Well, he looked for any left-handed products that might already be on the market which were very few. And then contacted the manufactures with the idea of having products produced for him, mainly in the scissors range to start with. W: Right. So you do commission some part of your stock. M: Yes, very much so. About 75 percent of our stock is specially made for us. W: And the rest of it? M: Hmm, the rest of it now, some 25, 30 years after Mr. Gruby's initial efforts, there are more left-handed product actually on the market. Manufactures are now beginning to see that there is a market for left-handed products. W: And what's the range of your stock? M: The range consists of a variety of scissors from children scissors to scissors for tailors, hairdressers etc. We also have a large range of kitchen ware. W: What's the competition like? Do you have quite a lot of competition? M: There are other people in the business now in specialists, but only as mail-order outlets. But we have a shop here in central London plus a mail-order outlet. And we are without any doubt the largest supplier of the left-handed items. What was said before this conversation?
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output: W: Now, could you tell me where the idea for the business first came from?
Please answer this: W: Yes, it was wonderful. I particularly like the works by Da Vinci. M: I wish I had gone but I heard we had to wait for two hours to get the ticket. What was said before this conversation?
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Answer: M: Did you go to the Italian High-tech Exhibition in Tianjin University last month?
Problem: M: Oh, that's good news! We haven't seen them for ages. W: Yeah. The last time we met them was at our wedding three years ago. M: Did Pamela mention how long they'll stay? W: About one week. M: Great! I can't wait to show them around our new house. W: Me too. We haven't had any guests since we moved in here. If the weather is fine, we can have a barbecue in the garden. M: Good idea. I'll go to the market tomorrow to buy all the things we'll need. What was said before this conversation?

A: W: Harry, guess what? I've just received an email from Pamela. She and Peter are coming down to see us this weekend.
Problem: Given the question: M: I've been told that green tea can lower the risks of heart disease, stoke and cancers. W: Besides that, it's good for memory. And it helps fall down eating of the brain. What was said before this conversation?
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The answer is:
W: The article said scientists have found a new benefit of green tea.
Problem: M: Oh, I put some books in it. Let me carry it. What was said before this conversation?

A:
F: What is in this box? It's so heavy.