The firemen arrived the fire broke out.A. soon afterB. before longC. long beforeD. after

问题补充：

The firemen arrived the fire broke out.

A. soon after

B. before long

C. long before

D. after soon

答案：

(答案→)A. soon after

B. before long

C. long before

D. after soon

解析：soon after意思为：不久；before long意思：不久之后, 在短时间内； long before很久以前。固定短语