________they decide which college to go to，students should research the admission procedures.
#30038
A
As
B
While
C
Until
D
Once
推荐题目
Don’t be afraid of asking your teachers for help ________it is needed.
#30228
A
as
B
since
C
unless
D
when
Our class discussed the question of __________it is necessary for us students to use mobile phones on campus.
#31888
A
if
B
where
C
whether
D
that
________ the delayed flight will take off depends much on the weather.
#29995
A
Why
B
When
C
That
D
What
I've become good friends with several of the students in my school I met in the English speech contest last year.
#31150
A
who
B
where
C
when
D
which