You’ll surely make progress _______ you work with a strong will.
A. unless
B. until
C. as long as
D. as well as
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I'll stay here _______ everyone else comes back.
A. even if
B. as though
C. because
D.until
Hard-working though he was, ________ there was never enough money to pay the bills.
A. /
B. and
C. but
D.therefore
Much hard ________ he tried, he failed to catch up with the first runner.
A. although
B. as
C. while
D. when
I would never speak to someone like that ________ they said something unpleasant to me.
A. even if
B. so that
C. as if
D. ever since