The roof fell he had time to dash into the house to save his baby. A. asB. afterC. untilD

问题补充：

The roof fell he had time to dash into the house to save his baby.

A. as

B. after

C. until

D. before

答案：

A. as

B. after

C. until

(答案→)D. before

解析：本题考查before引导的时间状语从句，意为“在……之前”。句意为“他来不及冲进去救他的孩子，屋顶就塌了”。