单项选择题

What is the main idea of the text

A．organically grown foods are nutritious.
B．how to buy organically grown foods.
C．what does organically grown foods mean
D．a general standard should be established to regulate the organically grown produce.

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单项选择题

The author advises consumers to______.

A．look for foods with such words as "certified organically grown"
B．grow their own food without synthetic chemicals
C．buy foods from a seller they often deal with
D．make sure the foods are pesticide free before buying them

单项选择题

What is considered to be the most important ingredient that makes a horror story

A．Irrationality.
B．Melancholy.
C．Uncertainty.
D．Suspension.