单项选择题

In the last paragraph, people are recommended to have ______.

A．foods containing large quantities of refined flour and vegetables
B．foods with fibers removed
C．foods with more fibers
D．food with additives
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单项选择题
Which of the following can not be referred to as natural food
A．Vegetables and fruits with essential vitamins and minerals.
B．Foods grown in soil rich in organic matter.
C．Poultry fed in free pastures.
D．chickens raised on battery farms.
单项选择题
The use of chemicals and fertilizers in farming is meant to increase ______.
A．the quantity of foods
B．the quality of foods
C．either the quantity or the quality of foods
D．the quality as well as the quantity
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