单项选择题

The phrase "ring of fire" ( Para. 3 ) refers to ______.

A．the area around or in the Pacific Ocean where most of the world's earthquakes happen
B．the area where earthquakes are too small to be felt
C．the area under the ocean or away from people
D．the area where earthquakes occur a million times a year
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单项选择题
It can be concluded from the passage that ______.
A．earthquakes no longer happen any more since many cities are taking steps to prevent loss of life in earthquakes
B．more sensitive machines are used to measure the strength of earthquakes
C．people can save themselves when earthquake happens
D．earthquakes do less damage to human beings became many cities are taking steps to prevent loss of life in earthquakes
单项选择题
Where did the horse originate
A．In the Middle East.
B．In Europe.
C．On the North American continent.
D．In Spain.
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