Questions 69－75 are based on the following passage.

The United States government publishes guidelines for appropriate nutrient intakes. These are known as the Recommended Dietary Allowances (RDAs) and are updated regularly based on new research in nutrition. RDAs are suggested amounts of calories, protein, and some minerals and vitamins for an adequate diet. For other dietary substances, specific goals must await further research. However, for the U.S. population as a whole, increasing starch and fiber in one’s diet and reducing calories (primarily from fats, sugar, and alcohol) is sensible. These suggestions are especially appropriate for people who have other factors for chronic diseases due to family history of obesity, premature heart disease, diabetes, high blood pressure, and high blood cholesterol, or for those who use tobacco.

Snacks can furnish about one-fourth of the calorie requirements among teenagers. Those snacks should also provide much of the day’s allowances for protein, minerals, and vitamins. Sandwiches, fruit, and milk make good snacks for active teenagers. Food from the food pyramid may be part of any meal. A grilled cheese sandwich or a bowl of whole-grain cereal is just as nutritious in the morning as it is at noon. In addition, a good breakfast consists of any foods that supply about one-fourth of the necessary nutrients for the day.

69. The passage directly states that most of the U.S. population should increase their intake of_____.

A. protein

B. fats

C. starch and fiber

D. sandwiches

70. A good breakfast should supply about what percentage of the necessary nutrients for the day?

A. One-half.

B. One-third.

C. One-fourth.

D. Less than one-fourth.

71. The passage implies which of the following?

A. The time of day when food is consumed affects its nutritive value.

B. Different foods can be combined to increase total nutrition value.

C. It can be detrimental to your health to eat breakfast foods later in the day.

D. When food is eaten has no bearing on its nutritive effects.

72. Why are RDAs regularly updated?

A. New discoveries in the science of nutrition are constantly being made.

B. Americans’ diets are constantly changing.

C. As people age, their nutritional needs change.

D. Very little is currently known about nutrition.

73. In this passage RDAs refers to_____.

A. types of vitamins

B. types of protein

C. types of minerals

D. amounts of energy, protein, vitamins, and minerals

74. One implication in this passage is that_____.

A. all RDAs have been established

B. not all RDAs have been established yet

C. it’s not important to know RDAs

D. RDAs are necessary only for sick people

75. The reduction of calories in the diet is particularly good for people who suffer from______.

A. obesity

B. premature heart disease and diabetes

C. high blood pressure and cholesterol levels

D. all of the above