The fire was finally brought under control but not heavy damage had been caused.A. before

问题补充：

The fire was finally brought under control, but not heavy damage had been caused.

A. before

B. after

C. since

D. until

答案：

(答案→)A. before

B. after

C. since

D. until

解析：考查时间状语从句。句意“大火最终得到了控制，但没来得及避免严重的损坏。”before可意为“没来得及做某事”。故选A。