Jackson returned to Seattle for a while to Canada and worked a few jobs there before he

问题补充：

Jackson returned to Seattle for a while, to Canada, and worked a few jobs there before heading for New York .

A. moving

B. moved

C. being moved

D. having moved

答案：

A. moving

(答案→)B. moved

C. being moved

D. having moved

解析：句意：杰克孙先返回到西雅图，又搬到了加拿大，在去纽约之前在那里做了几项工作。这里是并列的谓语动词，从and前后连接的动词来看都是用的过去式，所以这里也用过去式，故选B。