The heavy snow lasted for a week a serious traffic confusion in the whole area.A. causin

问题补充：

The heavy snow lasted for a week, a serious traffic confusion in the whole area.

A. causing

B. caused

C. having caused

D. being caused

答案：

(答案→)A. causing

B. caused

C. having caused

D. being caused

解析：考察分词作状语用法。现在分词作状语表示意料之中的结果，本题不存在完成时的形式，故A正确。句意：暴雪持续了一个星期，导致了整个地区严重的交通堵塞。