Question

【题目】 The fire was finally __________ after the building had __________ for two hours.

A. put off; caught fire B. put away; been on fire

C. put out; been on fire D. put down; caught fire

Answer 1

【答案】C

【解析】put off推迟，拖延；put away收好，放好；put out熄灭，出版；put down放下，镇压；be on fire着火（侧重状态）；catch fire着火（侧重动作）。完成时一般与时间段连用，由语境可知应该使用延续性动词。故选C。