Fill gaps with articles : a, an, the or (-) a bag in a bag. this is a true story. last year i went big sports shop because i bag. assistant came up to me and i told him what i wanted. asssistant brought me three different bags. i chose smallest one and paid for it. asssistant put bag in large plactic bag. i told him one bag was enough and ask him to take bag out of other. he did so but he looked very unhappy as i walked out of shop.