The store sells sweaters a very good price. We can buy one 40 yuan.
A. in; at
B. on; for
C. at; on
D. at; for
网友回答
A. in; at
B. on; for
C. at; on
(答案→)D. at; for
解析：根据语境可知此句的含义是商店有廉价的毛衣，我们可以49yuan买一件。固定短语at a good price表示廉价，buy one for+价格表示买东西花多少钱，故选D。