As Christmas approaches, the big shops stay ( ) long after da

As Christmas approaches, the big shops stay ( ) long after dark.
A、opened
B、open
C、openly
D、opening
【正确答案】：B
【题目解析】：stay+adj.保持某种状态，句子含义是圣诞节的到来，大型商场天黑后一直营业到很晚。