11.   Both of them seem to have Decided to become Novelists with teeth gritted, by sheer force of will.

12.   Brian then had to face the full force of the Sutherland-Anderson fact-finding machine on his own.

13.   But they were not willing to see one acre of irrigated land succumb to the forces of nature, regardless of cost.

14.   But we also attribute to him the power to mediate between those same concerns and the hostile forces of disease.

15.   By force of circumstances, I found myself having to share an office with my previous manager.

16.   By January he had raised an army of twenty-five thousand men and had headed north to intercept the forces of General Taylor.

17.   By sheer force of will she ignored the sounds of pattering and gnawing near the body in the corner.

18.   Centrifugal force can be greater than the force of gravity.

19.   Class and social change Class struggle Marx believed that the class struggle was the driving force of social change.

20.   Consequently the force of gravity at perigee is not enough to hold it in a circular orbit.