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1. Typical of the grassland dwellers of the continent is the American antelope, or pronghorn.

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2. Of the millions who saw Haleys comet in 1986, how many people will live long enough to see it return in the twenty-first century?

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3. Anthropologists have discovered that fear, happiness, sadness, and surprise are universally reflected in facial expressions.

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4. Because of its irritating effect on humans, the use of phenol as a general antiseptic has been largely discontinued.

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