You have failed two tests.You'd better start working harder, ________you won't pass the course.
A．and B．so C．but D．or
I thought we'd be late for the concert，________ we ended up getting there ahead of time.
A．but B．or C．so D．for
It is often said that the joy of traveling is ________ in arriving at your destination ________ in the journey itself.
A．/；but B．/；or C．not；or D．not；but
—I wonder how much you charge for your services.
—The first two are free ________ the third costs $30.
A．while B．until C．when D．before
Try to read stories in English and speak in English whenever you can，________ you will see more progress over time.
A．but B．or C．and D．so
Stand over there ________ you'll be able to see the oil painting better.
A．but B．till C．and D．or
