In order to attract more customers many supermarkets usually sell their goods at a good a

问题补充：

In order to attract more customers, many supermarkets usually sell their goods at a good at weekends.

A. benefit

B. discount

C. interest

D. cost

答案：

A. benefit

(答案→)B. discount

C. interest

D. cost

解析：名词辨析。A好处，益处；B折扣；C利益；D成本，费用；结合句意可知B正确。句意：为了吸引更多的顾客，很多超市在周末以更大的折扣出售货物。