单选题After searching the mall&

问题补充：

单选题Aftersearchingthemallforawholeafternoon,themomfinallyboughtaniceskirt,asapresentforheryoungdaughter,ata_____yesterday.A.discountB.bargainC.payD.cost

答案：

A解析考查名词辨析。discount折扣；bargain便宜货；pay报酬；cost费用成本；固定词组at a discount表示打折的意思。