Question

what do you think of teaching, Bob? ——I find it fun and challenging. It is a job( ) you are doing

what do you think of teaching, Bob? ——I find it fun and challenging. It is a job( ) you are doing something serious but interesting.
A. where B. when
为什么答案选A，我选B，可以表示当你做的时候，觉得有点难但很有趣

Answer 1

它是个定语从句，因为从句中主语和宾语都有。所以先行词job 在从句中做状语指的是 in this job.在这种工作中，你做着严肃而又有趣的事，把 先行词job 放回到从句中就是：you are doing something serious but intereting in the job.

要注意的是不能认为where 指地点，它还可以指情况，形势，例子，等，只要是做状语，而先行词又不是the reason (这时关系词用why,),时间（用when)，其他的都可用where 引导定语从句。

Answer 2

其实是状语从句，意思是工作虽然做起来严肃但很有趣，

不是觉得有点难但很有有趣