摘要：本题考查与价钱连用的介词的用法.value在本句中是动词.“估价 .后常用value +名词+at+具体多少钱.表示“估计某物值 .此时at表示价格.数量.速度等,后面“花买下某物 .既可用buy sth. at.也可用buy sth. for.思路拓展: ①for表示交换的概念.如:I gave him a record for his stamp. How much did you pay for the bag? I bought this set of coffee cups for $ 20. ②常用at a high/low price来表示“以高/低价 .

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