He made a mistake, but finally he solved the problem __________ it got worse.
#30987
A
until
B
before
C
when
D
as
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Tom had been studying French hard for nearly three years he mastered it．
#30569
A
after
B
when
C
since
D
before
We have no choice. _______ we go or we stay, the result is the same.
#31333
A
Once
B
Unless
C
Whether
D
While
we are alive , we can make it through through this natural disaster
#31343
A
Even if
B
As soon as
C
As if
D
so long as
They had no sooner arrived at the airport it was time to check in.
#32450
A
when
B
before
C
than
D
though
As the saying goes, practice makes perfect, ______is only by using English as often as possible can you learn English well.
#80346
A
which
B
as
C
that
D
this