Come and have a look. We have sweaters red yellow and blue10 yuan. A. at atB. on forC.

问题补充：

Come and have a look. We have sweaters red, yellow and blue10 yuan.

A. at, at

B. on, for

C. in, for

D. on, at

答案：

A. at, at

B. on, for

(答案→)C. in, for

D. on, at

解析：at在一点；on在上面；in在里面；for为了。句意：过来看看。我们有红色的、黄色的和蓝色的毛衣，每件十元。英语中表示某种颜色的衣服，一般用介词in，表示某种价格用介词for，for在这里是代替代表的含义。故选C。