The house with the ground is valued three thousand yuan but I bought it only one thousa

问题补充：

The house with the ground is valued three thousand yuan, but I bought it only one thousand yuan.

A. by; with

B. for; at

C. with; by

D. at; for

答案：

A. by; with

B. for; at

C. with; by

(答案→)D. at; for

解析：

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（多少钱）”，此时at表示价格、数量、速度等；后面“花（多少钱）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”。