问题补充：
—This bag is perfect. Miss, how much does it cost?
—, but I don’t work here.
A. I don’t know
B. I’m sorry
C. Maybe very dear
D. You can’t afford it
答案：
A. I don’t know
(答案→)B. I’m sorry
C. Maybe very dear
D. You can’t afford it
解析：考查交际用语。根据答语中但是我不在这工作，可推断出前半句应表示歉意，所以用I’m sorry，故选B。
