—We can’t be successful ________ we keep working hard.—I agree with you.      
#56381
A
if
B
unless
C
because
D
when
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You will fail the English exam ________ you study hard.
#57214
A
however
B
anyway
C
unless
D
but
________ I’m thirsty , __________ I drink some water.
#56504
A
Because ; so
B
So ; because
C
Because ; /
D
So ; /