. the warning message more lives would have been lost in the flood.A. Regardless ofB. In

问题补充：

. the warning message, more lives would have been lost in the flood.

A. Regardless of

B. In spite of

C. But for

D. Except for

答案：

A. Regardless of

B. In spite of

(答案→)C. But for

D. Except for

解析：短语辨析。A. 不管；不顾 B. 尽管；不管 C. 要不是；如果没有 D. 除了以外；要不是由于（不包括）句意：要不是这条警告消息，更多的生命会在洪水中失去。结合语境可知选C。