By the time the fire-engine arrived, the fire by the inhabitants.
A. put out
B. had been put out
C. was put out
D. had put out
网友回答
A. put out
(答案→)B. had been put out
C. was put out
D. had put out
解析：本题考查时态和语态。句意：当救火车到达的时候，火被居民们扑灭了。由句意可知应用被动语态；且动作在arrived之前发生，要用过去完成时。