单项选择题

We can infer from the passage that ______.

A．a great mass of solid rock suddenly moves deep inside the earth
B．earthquake usually does great damage to human beings
C．earthquake cannot be measured
D．earthquake takes place with a loud roar
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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
What is said about the earthquakes that happened in China
A．Altogether 1,480,000 people were killed in the earthquakes.
B．In the past, earthquakes happened twice in China.
C．China is within the "ring of fire".
D．In the history, China had two worst earthquakes that took an enormous number of human lives.
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