76. We learn from the passage that olestra is a substance that ____.

1. contains plenty of nutrients
2. renders foods calorie-free while retaining their vitamins
3. makes foods easily digestible
4. makes foods fat-free while keeping them delicious

77. The result of the search for an easily digestible fat turned out to be ____.

1. commercially useless
2. just as anticipated
3. somewhat controversial
4. quite unexpected

78. Which of the following is NOT true about the fatty acid?

1. The fatty acid is made up of three molecules of substances.
2. The fatty acid can be absorbed by the intestines.
3. The fatty acid brings the essential vitamins A, D, E and K to the intestines.
4. Olestra is made from six to eight molecules of fatty acids.

79. Olestra is different from ordinary fats in that ____.

1. it passes through the intestines without being absorbed
2. it facilitates the absorption of vitamins by the body
3. it helps reduce the incidence of heart disease
4. it prevents excessive intake of vitamins

80. Why are nutritionists concerned about adding vitamins to olestra?

1. It may lead to the over-consumption of vitamins.
2. People may be induced to eat more than is necessary.
3. The function of the intestines may be weakened.
4. It may trigger a new wave of fake food production.

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