71.   How can athletes tell the difference between somebody who wants to help them and somebody who just might do them harm?

72.   How do you tell the difference?

73.   I can tell a difference.

74.   If he has a great day, you could never tell the difference.

75.   If we did land in a time tunnel, who could tell the difference?

76.   If you cannot tell the difference between a faux and a real leopard skin, you are a danger to all animals.

77.   In a blind test, could tasters tell the difference?

78.   If you brine, it will be hard to tell the difference between fresh and frozen.

79.   In most cases, I would have been hard pressed to tell the difference between them and those baked in metal.

80.   In informal tastings of food grilled over gas and briquettes, none of my friends could tell the difference.