In time of serious accidents, ________ we know some basic things about first aid, we can save lives.
#30162
A
whether
B
until
C
if
D
unless
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She worked hard ________ everything would be ready by the time he came back.
#80243
A
since
B
so that
C
as if
D
unless
Tom sacrificed his personal life ________ he could get ahead in his career.
#30690
A
in case
B
as if
C
so that
D
only if
I promised to write to her ________I got to New York.
#31703
A
at the moment
B
the moment
C
soon
D
long before
Everything was placed exactly________he wanted it for the graduation ceremony.
#30236
A
while
B
when
C
where
D
though
The patient's son asked the doctor the question________his father could survive the big operation.
#32129
A
whether
B
if
C
that
D
what