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  3. Nowadays people have increasingly become aware of the need to change their eating habits, because much of the food they eat, par

Nowadays people have increasingly become aware of the need to change their eating habits, because much of the food they eat, par

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问题     Nowadays people have increasingly become aware of the need to change their eating habits, because much of the food they eat, particularly processed foods, is not good for their health. 【C1】_____, there has been a growing interest in natural foods: foods which do not contain chemical additives and【C2】_____have not been affected by chemical fertilizers.
    Natural foods, for example, are vegetables, fruit and grain which have been grown in soil that is rich【C3】_____organic matter. In simple terms, this means that the soil has been nourished by unused vegetable matter, which【C4】_____it with essential vitamins and minerals. This in itself is a/an【C5】_____process compared with the use of chemicals and fertilizers, the main purpose of which is to【C6】_____the amount but not the quality of goods【C7】_____in commercial farming areas.
    Natural foods also include animals which have been allowed to【C8】_____and move freely in a healthy environment. Compare this with【C9】_____happens in the mass production of chickens-thousands of chickens are【C10】_____in one building and are fed on food which is【C11】_____better than rubbish. Such chickens are not only【C12】_____as food; they also produce eggs【C13】_____vitamins.
    There are other【C14】_____of healthy eating. Fibre, for example, is【C15】_____important in a healthy【C16】_____. In white bread, the fibre has been removed.【C17】_____it is present in unrefined flour and in vegetables. In places where the national diet【C18】_____large quantities of unrefined flour and vegetables, certain diseases are comparatively【C19】_____. Hence the emphasis is placed【C20】_____the eating of whole meal bread and more vegetables.
【C20】
选项 A、for
B、at
C、in
D、on
答案D
解析 本题考查固定搭配。空格处句意为：因此要吃全麦面包，多吃蔬菜。故选D)项。place emphasis on“强调”为固定搭配。
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