单项选择题

According to the last paragraph, consumers who believe that organic foods are better than conventionally grown foods are often ______.

A．careless
B．mistaken
C．thrifty
D．wealthy
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单项选择题
The author implies that there is cause for concern if consumers with limited incomes buy organic foods instead of conventionally grown foods because ______.
A．organic foods can be more expensive but are often no better than conventionally grown foods
B．many organic foods are actually less nutritious than similar conventionally grown foods
C．conventionally grown foods are more readily available than organic foods
D．too many farmers will stop using conventional methods to grow food crops
单项选择题
According to the first paragraph, which of the following is true about the term organic foods
A．It is accepted by most nutritionists.
B．It has been used only in recent years.
C．It has no fixed meaning.
D．It is seldom used by consumers.
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