I will come _____ I don’t change my mind. 
#75176
A
unless
B
if
C
because
D
though
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Unluckily, we missed the train. we    early.
#62750
A
must have set out
B
had set out
C
should have set out
D
set out
There was something wrong with the network,or the e-mail____ earlier.
#62904
A
could have been sent
B
might be sent
C
need have been sent
D
must be sent