51.   Under duress, it regularly exercises this will to sabotage the earnest efforts of its well-intentioned host.

52.   We gaze at one another despite the effort of heavy lids, our nodding heads, until the lull of sleep defeats.

53.   Why do the retraining efforts of self-defeating organizations tend to create at least as many difficulties as they resolve?

54.   With a great effort of will, she resisted the temptation to look at the letter.

55.   With a tremendous effort of will, he straightened up and stood against the wall.

56.   The effort of climbing the stairs had been too much for the old man.

57.   The money was raised largely through the efforts of parents.

58.   With a supreme effort of will Isabel forced back the tears.

59.   Despite the efforts of the United Nations, the problem of drug traffic continues to grow.

60.   These refugees are looked after by the combined efforts of the host countries and non-governmental organisations.