saline wants to find a job ()she can use what she learned at

主句：saline wants to find a job。
从句：she can use what she learned at school (in the job)。
因为从句中主谓宾都全了,缺的是状语in the job,所以要用where 或者in which来引导。where指代in the job,which指代先行词job。that或者which是不能作从句的状语的。