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Read the following passage carefully and then answer the questions that follow :
A recent investigation by scientists at the U.S. Geological Survey shows that strange animal behavior might help predict future earthquakes. Investigators found such occurrences in a ten-kilometer radius of the epicenter of a fairly recent quake. Some birds screeched and flew about wildly; dogs yelped and ran around uncontrollably. Scientists believe that animals can perceive these environmental changes as early as several days before the mishap.
In 1976 after observing animal behavior, the Chinese were able to predict a devastating quake. Although hundreds of thousands of people were killed, the government was able to evacuate millions of other people and thus keep the death toll at a lower level.
fewer animals going crazy
a lower death rate
fewer people evacuated
fewer environmental changes
Some animals may be able to sense an approaching earthquake.
By observing animal behavior scientists perhaps can predict earthquakes.
The Chinese have successfully predicted an earthquake and saved many lives.
All birds and dogs in a ten-kilometer radius of the epicenter went wild before the quake.
Animals are smarter than humans.
Animals have certain instincts that human don't possess.
By running around the house, they can feel the vibrations.
Humans don't know where to look.
an impending earthquake.
the number of people who will die.
the ten-kilometer radius of the epicenter.
environmental change
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