21.   During the war military training took several hours of the school curriculum and this did not end with the armistice.

22.   Each of the educators and programs in these pages developed over countless hours of experimentation and trial and error.

23.   Even popular television war comedies were taken off the air, for fear of jarring too awkwardly with endless hours of Gulf coverage.

24.   Few people dared to venture out during the hours of darkness.

25.   Gone were the high spirits of the first hours of our escape.

26.   Her bag was stolen within hours of her arrival.

27.   Hours of daily practice on the firing range had formed the callus.

28.   I do half an hour of exercises every morning.

29.   I face the lonely and exposed landscape, softened in this dying hour of the day by a late sprinkling of sun.