单项选择题

What does the term "organic food" in Paragraph 2 mean

A．Food that is sold in supermarket.
B．Food that is produced without artificial fertilizers.
C．Food that is added with chemicals.
D．Food that is processed.

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单项选择题

Which term is used to distinguish between types of the same food

A．Refined foods.
B．Natural foods.
C．Organic foods.
D．Unprocessed foods.

单项选择题

What did all of the additives in bread have in common

A．They are all used to keep the bread from getting moldy.
B．They are all poisons.
C．They are all organic.
D．They have all killed laboratory animals.