选择题：He__the display for several minutes before re-entering his shop.
问题描述：
选择题：He__the display for several minutes before re-entering his shop.
（A）was gazing at
（B）gazed at
（C）had gazed at
（D）had being gazing at
答案是B,我觉得是C.请高手分析一下.
参照新概念英语第三册第六课选择题5.
答
此处before表示“过了多久之后才……”,意思是“他看了摆出的商品几分钟之后才再次进入商店”,所以选B