What is the main idea of this passage？
A. Health food.
B. The processing of bread.
C. Organic gardens.
D. Poisons.
What happens to food when it is processed？
A. The ultimate content remains the same.
B. The vitamin information is not available after processing.
C. The vitamin content is reduced altogether.
D. The vitamin content is greatly reduced.
According to the text, punctuation is naturally used when______.
A. a writer already knows what he/she means to say
B. a writer needs an aid
C. long or complex sentences are written
D. writing sentences with question and exclamation marks
What does the author imply by saying "living space...is figured...also in cubic volume above the earth." (Para. 3)？
A. We need to take some measures to protect space.
B. Our living space should be measured in cubic volume.
C. Our living space on the earth is getting smaller and smaller.
D. We must preserve good living conditions for both birds and animals.
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