herself in looking after the newly-born twins she had to sacrifice her career to stay wi

问题补充：

herself in looking after the newly-born twins, she had to sacrifice her career to stay with her kids.

A. Occupied

B. Being occupied

C. Having been occupied

D. Occupying

答案：

A. Occupied

B. Being occupied

C. Having been occupied

(答案→)D. Occupying

解析：Occupy与其逻辑主语“she”是主动关系，故用现在分词的主动式作原因状语。