—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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Beckham stopped playing soccer ______ his bad leg. 
#58493
A
as for
B
because
C
because of
D
as
There _______ a basketball match between Class One and Class Three this afternoon.
#55329
A
is going to be
B
will have
C
are going to be
D
is going to have
I have known him________ I was young.
#55691
A
before
B
when
C
after
D
since