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          because        caused        impossible        location         destruction     eruption

The word ‘tsunami' comes from the Japanese word for tidal wave. .These huge waves are (36)......      by underwater earthquakes or volcanic eruptions.

Most tsunamis occur in the Pacific Ocean. There is no doubt that tsunamis cause great (37).............. when the waves reach the shore. However, most death that occur after a tsunami are (38)........................ of people’s lack of preparation.

People should escape to higher ground the minute they are warned of a possible tsunami, in the past, it was (39).........................................to inform people in time, but today scientists have developed tsunami warning systems. Various instruments determine the (40)...........................  of where an underwater