The most important thing for Lucy is to find a proper job in which she can bring her abili

问题补充：

The most important thing for Lucy is to find a proper job,in which she can bring her ability and potential into full play.

A. that

B. this

C. one

D. the one

答案：

A. that

B. this

(答案→)C. one

D. the one

解析：．One做a proper job的同位语相当于a job。对露西来说最重要的事情是找到合适的工作，一份她能有用武之地的工作。