—What do you think of teacher，Bob?—I find it fun and challenging.It is a job you are doin

—What do you think of teacher，Bob?
—I find it fun and challenging.It is a job you are doing something serious but interesting.
A. where
B. which
C. when
D. that

(答案→)A. whereB. whichC. whenD. that解析：先行词a job在定语从句中作状语，故选where。

这个问题的回答的对