______(49)A.a price contains all the connotation
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______(49)
A.a price contains all the connotation of other terms of purchase
B.obtained by the purchase of a new bottling machine by a soda manufacturer
C.where the consumer gives the seller money plus a trade-in
D.available for other items
E.prices are usually reduced by sellers
F.price means what one pays for what he wants
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答案：C
空格前的句子表明，货币交易和非货币交易可育胜结合在一起，空格处的句子举“汽车买卖”的例子说明这种情况。C项在这里用作定语从句，它的先行词是automobilesa trade-in意为“折价旧物”。