the fire was discovered soon after it broke out otherwise it might cause much greater

问题补充：

, the fire was discovered soon after it broke out , otherwise it might cause much greater damage．

A. Strangely

B. Eventually

C. Naturally

D. Fortunately

答案：

A. Strangely

B. Eventually

C. Naturally

(答案→)D. Fortunately

解析：副词辨析。A奇怪地；B最后；C自然；D幸运地；句意：幸运地是，在大火爆发之前就被发现了，否则这次大火也许会导致巨大的损失。根据句意说明D正确。