Some researchers are finding that daydreaming may be important to ______ mental health and it is ______ good means of relaxation.
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.