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Don’t stop working _____ twelve. 
#58157
A
to
B
at
C
when
D
until
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My sister still wanted to go to school ____ she was ill.
#57022
A
if
B
because
C
before
D
although
If all the plants on the earth die, _______ people _________animals will be able to live.
#56732
A
neither; nor
B
both; and
C
not only; but also
D
either; or
Cross the road carefully, _________ you’ll keep yourself safe.
#57533
A
so
B
or
C
but
D
and
 Playing soccer is difficult, ________I like it.
#55925
A
and
B
or
C
of
D
but
_______ they were not rich, they tried their best to send their child to the best school. 
#58252
A
However
B
Because
C
Even though
D
So