单选题 Speaker A: Frank, where are the cookies? Don't tell me you ate them all! Speaker B: ______. They were so good.
【正确答案】 B
【答案解析】A说：“饼干在哪儿呢?别告诉我，你把它们都吃光了吧?”B回答：“是的。我忍不住(都吃了)。”can't help it的意思是“情不自禁，忍不住”的意思。故本题选B项。