单选题 We were so busy that we had to ______ going on holiday for a month.

【正确答案】 C

【答案解析】我们太忙了以至于要取消一个月的假期。put off 意为“取消，推迟”，put away 意为“收起来，藏起来”，put down 意为“放下，写下，镇压”，put out 意为“熄灭，抹杀”。