68. From the passage we can learn that

　　A. all foods consist of chemical substances

　　B. it is right to reject chemicals in food

　　C. food additives are harmful to our health

　　D. natural foods are much safer than man-made ones

　　【答案】A

　　【解析】由第一段The truth is that all food is made up of chemicals.事实上所有的食物都含有化学物质。可知A为正确答案。

　　【考点定位】考查细节理解题。

　　69. Which of the following is TRUE according to the passage?

　　A. Foods with more additives have higher nutritional value.

　　B. To ensure food safety, the FDA will ban food additives.

　　C. Foods free of additives can keep a much longer shelf life.

　　D. Food additives can improve the quality of foods in many ways.

　　【答案】D

　　【解析】由第三段介绍食品添加剂可以防潮，改善品味，提高营养等可知D为正确答案。

　　【考点定位】考查细节理解题。

　　70.We can infer from the regulation to the food additives by the FDA that

　　A. new additives will be approved more easily than before

　　B. food producers won’t be allowed to use new food additives

　　C. food with common-used additives will be taken off the market

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