At the computer operation test, one is supposed to stay at his own machine, keep his eyes on his screen, _______ to anyone.
There ____ no buses, we had to walk home after work yesterday.
—Why not take my car to the museum instead of walking? — No, thanks. ____.
_________ for the free tickets, I would not have gone to the films so often.
I think they failed to accomplish the task, ______?
You might as well expect a river to flow backward ____ us carrying out the plan.