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_________ caused the accident is still a mystery.
#30978
A
How
B
What
C
That
D
Where
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Take the note as a reminder_________ you forget to buy some sweets for the kids while shopping there.  
#30112
A
so that
B
even if
C
in case
D
as if
Edison asked his father why the hens could hatch eggs ___he couldn’t.
#33835
A
as
B
and
C
when
D
while
We wouldn’t go to Philippine for our vacation         we could afford it．
#32424
A
as if
B
so that
C
now that
D
even if
______we have enough evidence, we can’t win the case.
#31184
A
Once
B
As long as
C
Unless
D
Since
How can you expect to make progress ______ you never listen in class?
#33457
A
before
B
until
C
though
D
when