The old couple walked rather slowly, and could be seen, from time to time, to stop and rest, ________ out to sea.
To keep fit, the old man makes it a rule _____ for a walk after supper every day.
--I'm sorry I made a mistake! --__________Nobody is perfect.
One can always manage to do more things, no matter______ full one’s schedule is in life.
The police were seeking more information to find out________ killed the rich merchant.
Had they known what was coming next, they _________second thoughts.