The little boy saved every coin __________ he could buy his mother a present on Mother's day.
The days are gone _____ physical strength was all you needed to make a living.
______ volleyball is her main focus, she’s also great at basketball. A Since B. Once C. Unless D. While
---I need to advertise for a roommate for next term. ---______ ? Mary is interested.
It sounds like something is wrong with the car’s engine. _____ , we’d better take it to the garage immediately.
Only after they had discussed the matter for several hours ______ a decision.