71.  A range of data sources will be used to derive the best possible estimates.

72.  A rarely used volleyball net stood lonely in the dirt and weeds.

73.  A reduction in computational complexity will provide greater flexibility in choice of models used to predict outcomes and correlations.

74.  A relatively small number of questions on percentages was used in the tests developed by the project.

75.  A seam ripper is useful, but should be used with caution to avoid cutting fabric.

76.  A security officer from a nearby building appeared with a piece of metal which possibly had been used to attack the meter.

77.  A series of articles and television shows publicized concerns that the chemical Alar, used to keep apples red and firm, could cause cancer.

78.  A series of payments used to be the exception rather than the rule.

79.  A significant difference might be described between the way in which Degas and the battle painters used these photographs.

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