Of the two coats, I'd choose the one to spare some money for a book.A. cheapestB. most exp

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A. cheapest
B. most expensive
(答案→)C. cheaper
D. more expensive
解析：句意：这两件大衣我愿意选择更便宜的那个以便省出一些钱买书。根据提示词two判断选择比较级，结合句意判断选便宜的可以省钱。故选C。 
考点: 考查形容词比较级的用法。