The woman sold the eggs seven dollars and they were soldhalf price.A. with；atB. for；atC.

问题补充：

The woman sold the eggs seven dollars and they were soldhalf price.

A. with；at

B. for；at

C. at；in

D. by；on

答案：

A. with；at

(答案→)B. for；at

C. at；in

D. by；on

解析：

第一空用for“换取”，意为“这位妇女的鸡蛋卖了七美元”；第二空用at，at...price“以……的价格”。故选B。