单项选择题

This passage is mainly concerned with_________.

A．people' s growing interest in natural foods
B．natural food and health diet
C．the importance of fibre in foods
D．harmful effects of sugar
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单项选择题
Food that is rich in organic matter_________.
A．has been nourished by fertilizers
B．contains vegetable matter that has not been consumed
C．has had chemicals and fertilizer added to it
D．contains large quantifies of vitamins
单项选择题
Which of the following is a reason for people' s growing interest in natural foods
A．They want to return to nature.
B．They want to eat all kinds of foods.
C．Natural foods are very delicious.
D．They are more health conscious.
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