问题描述：
[-B5] -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.which
C.when
D.that
翻译并分析
are doing something serious but interesting.
A.where
B.which
C.when
D.that
翻译并分析
问题解答：
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