Usually pilots need about a decade of experience _______ they can be promoted to captain.
#31003
A
after
B
before
C
then
D
when
推荐题目
I’d like to study law at university _____ my cousin prefers geography.
#31435
A
as
B
though
C
if
D
while
She has expressed her hope ______ the foreign students will spread the good will and sincerity of the Chinese people to other parts of the world.
#30168
A
that
B
which
C
whether
D
what
--- May I go and play with Dick this afternoon, Mum?--- No, you can’t go out _____ your work is being done.
#31631
A
before
B
until
C
as
D
the moment
—— Oh, it’s raining hard outside. Mum, do you think the milkman will come?—— Of course. He will come on time _____it rains.
#32457
A
in case
B
even though
C
as long as
D
ever since