单项选择题

The word "innovations" in the second paragraph means _________.

A．new theory
B．new phenomenon
C．changes
D．new inventions
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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
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
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