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
He didn't expect that his parents could manage to know ________ is going on in his college life on the Internet.
#30084
A
how
B
which
C
what
D
that
---Miss Li, where did you visit last week?--- I visited a big company __________ ships are made.
#31721
A
that
B
which
C
where
D
whose
Have you seen the film “Titanic”, ____ leading actor is world famous?
#33584
A
that
B
it’s
C
whose
D
which
Sometimes, ___ we show our gratitude for a person is reflected in the kind of food we serve him or her．
#30972
A
whether
B
when
C
why
D
how
—What do you think of it?—Well，it’s worth doing ________ the result is satisfactory.
#30224
A
the moment
B
as soon as
C
once
D
so long as