You should inspect the wheels regularly, and replace them ______ they cause you trouble.
#31371
A
while
B
as
C
before
D
until
推荐题目
My last lesson in French! I hardly know how to write, _______ I would never learn now .
#79902
A
but
B
and
C
if
D
so
Tell your doctor with a detailed medical history ______ he can give you the accurate treatment.
#31347
A
even if
B
so that
C
in case
D
as though
I knew nothing about the accident__________ I read in the newspaper.
#78608
A
except that
B
except what
C
besides what
D
besides that
My English has greatly improved , ______ I practice using it every day.
#32021
A
until
B
unless
C
though
D
as
There was never any time for her to feel happy, _____ lots of people loved her.
#33406
A
ever since
B
now that
C
even though
D
in case