An earthquake of 9 magnitude struck off the coast of Japan on Friday thousands of people

问题补充：

An earthquake of 9 magnitude struck off the coast of Japan on Friday, thousands of people dead and more missing.

A. caused

B. causing

C. having caused

D. to cause

答案：

A. caused

(答案→)B. causing

C. having caused

D. to cause

解析：cause与其逻辑主语An earthquake of 9 magnitude之间是主动关系，故用现在分词作结果状语，且现在分词动作和谓语动词动作不存在时间上的先后顺序，故用现在分词的一般式，故选B。