-----How long do you think it will be _____man can finally solve the problem of cancer?------Well．it depends．
#30201
A
when
B
until
C
after
D
before
推荐题目
There is never enough time to do everything, ______ there is always enough time to do the most important thing.
#30797
A
and
B
but
C
or
D
so
The changes in the city will cost quite a lot, ___________they will save us money in the long run.
#79767
A
or
B
since
C
for
D
but
Don’t stop _______ you meet with a word you don’t understand while reading.
#31364
A
at the time
B
every time
C
by the time
D
sometime
Several weeks had gone by _______ I knew the painting was missing.
#32417
A
as
B
since
C
until
D
before