单项选择题

The Chinese predicted an earthquake by ______.

A．employing amateur seismologists
B．observing professional geologists
C．watching animals, wells, and radioactive gas
D．evacuating the population
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单项选择题
Geologists are using modern technology to ______.
A．help predict earthquakes
B．enhance their reputations
C．measure the accuracy of earthquakes
D．control ground slippage
单项选择题
If predictions are correct, California ______.
A．will be struck by an earthquake in the next decade
B．will be saved from an earthquake within ten years
C．is unstable as a result of the San Andreas Fault
D．has nothing to fear
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