单选题 Health food is a general term applied to all kinds of foods that are considered more healthful than the types of foods widely sold in supermarkets. For example, whole grains, fried beans, and com oil are health foods. A narrower classification of health food is natural food. This term is used to distinguish between types of the same food. Raw honey is a natural sweetener, whereas refined sugar is not. Fresh fruit is a natural food, but canned fruit, with sugars and other additives, is not. The most precise term of all and the narrowest classification within health foods is organic food, used to describe food that has been grown on a particular kind of farm. Fruit and vegetables that are grown in gardens, that are sprayed only with organic fertilizers, that are not sprayed with poisonous insecticides, and that are not refined after harvest, are organic foods. Meat, fish, dairy and poultry products from animals that are fed only organically grown feed and that are not injected with hormones are organic foods.
In choosing the type of food you eat, then, you have basically two choices: inorganic, processed foods, or organic, unprocessed foods. A wise decision should include investigation of the allegations that processed foods contain chemicals, some of which are proven to be toxic, and that vitamin content is greatly reduced in processed foods.
Bread is typically used by health food advocates as an example of a processed food. First, the seeds from which the grain is sprayed with a number of very toxic insecticides. After the grain has been made into flour, it is made white with another chemical which is also toxic. Next a dough conditioner is added, along with a softener. The conditioner and softener are poisons, and in fact the softener has sickened and killed experimental animals.
A very toxic anti-fungal compound, is added to keep the bread from getting moldy.
Other foods from the supermarket would show a similar pattern of processing and preserving. You see we buy our good on the basis of smell, color, and texture, instead of vitamin content, and manufacturers give us what we want, even if it is poisonous. The alternative? Eat health foods, preferable the organic variety.

单选题 Which term is used to distinguish between types of the same food?
【正确答案】 B
【答案解析】[解析] 细节题。在第一段第四句中提到This term is used to distinguish between types of the same food.而this term所指代的正是第三句中的natural food。
单选题 What do all of the addictives in bread have in common?
【正确答案】 B
【答案解析】[解析] 推理判断题。第三、四段是对面包的制作加工过程的一个描述,但是我们发现从种粮食到面包的制成有添加剂的作用,而这些添加剂都是toxic或者poisonous,即有毒的,故答案为B。
单选题 What happens to food when it is processed?
【正确答案】 D
【答案解析】[解析] 细节题。根据第二段最后一句...vitamin content is greatly reduced in processed foods.可知答案为D。
单选题 We normally buy foods on the basis of______.
【正确答案】 D
【答案解析】[解析] 细节题。根据第五段...we buy our good on the basis of smell,color, and texture...与选项D中的内容相吻合,所以答案为D。
单选题 What is the main idea of this passage?
【正确答案】 A
【答案解析】[解析] 主旨推断题。纵观全文,作者在开头提出“绿色食品”的定义并且对定义进行解释说明,将人们日常生活中的食品进行了对比。作者在叙述全文时始终围绕“健康食品”展开。故答案为A。