单项选择题

To the countries in South-East Asia, building a tsunami monitoring system _________.

A．is what they can not afford
B．is not a practical solution
C．won't cost a lot of money
D．is effective but expensive
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单项选择题
It is implied in the last paragraph that _________.
A．people should be taught how to escape the tsunami
B．a sound detection system could have saved the disaster
C．radio stations neglected their responsibilities
D．the heavy loss in the South-East tsunami could have been less
单项选择题
An important question raised after the Tsunami is that _________.
A．how to help those helpless people
B．how to detect the happening of tsunami
C．how to predict tsunamigenic earthquakes
D．how people should be cautiously warned
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