()13.One should ______ the painful past according to the writer.()14.In the last paragraph the writer is actually telling us that a person in the world should be one who ______r markets, gas stations and restaurants have been interested in the organic(有机的) food. However, able to determine which is which, creating a lot of confusion for people who are truly concerned with buying the best and healthiest products.

　　In 2000, the United States Department of Agriculture (USDA) published its official position on organic foods and made its production controlled by a strict law. While there are several standards for organic foods, foods must be grown without the use of antibiotics(抗生素), (激素), On the other hand, natural foods have no legal rules, and are not controlled by any law. The USDA does require that the seller should list the parts of natural foods, but there are no official rules for the amount of natural parts a food must contain. A natural food is usually considered to contain less chemical things, though there is no way to keep an eye on the product.

　　The USDA has guidelines for organic production. When considering buying organic foods, you must take into consideration that the organic meat, eggs and milk products must come from animals that are given no antibiotics or growth hormones.

　　Due to higher labor costs, organic products cost 40% to 120% more compared with their natural foods. The most important thing to remember is to eat a variety of healthy foods, organic or natural foods. Eating more fruits, vegetables, low－fat and whole grains will be good for our health.()15.What can be used in growing organic foods?owth hormones.

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