如果你决定买房子，我们将免费赠送地毯和窗帘。
If you're set on buying the house, we'll throw in the carpets and curtains at no extra cost.
我们将免费替你修理汽车，因为它仍在保修期内。
We'll repair your car without charging because it's still under warranty.
我们将免费拟一份提案，其中包括详细的成本估算。
We'll put together a proposal, including detailed costings, free of charge.
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