(2013·北京，26)—What do you think of teaching，Bob?—I find it fun and challenging.It is a job ________ you are doing something serious but interesting.
#30496
A
where
B
which
C
when
D
that
推荐题目
You can go out _____ you promise to be back before 11 o’clock.
#80241
A
so that
B
as far as
C
so long as
D
in case
An independent traveler would like to struggle with maps and signs ____ he finds the way．
#31222
A
since
B
until
C
before
D
when
---When did you get to know each other ? ----It was in 2008___ we spent summer vocation together.
#33538
A
that
B
when
C
before
D
since
_______I toured Zhangjiajie, I was deeply impressed with its beautiful scenery.
#31331
A
For the first time
B
At first
C
It was the first time
D
The first time