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听力原文:W I think we may be able to increase our order above the 500 units I quoted you earlier. But if we do this, do you have any flexibility on price? M Absolutely. I can give you an extra 5 percent off. And I could cut a little more off if you're interested in purchasing a maintenance agreement with us. Does that interest you at all? W Yes, I'm sure we can do that. How long is the maintenance contract good for? M We have a basic 1 -year and an expanded 3-year plan. The longer plan includes free upgrades. What are the speakers doing?