Natural disasters, such as heavy snow, typhoon, ____ (飓风), flood, earthquake and ____ (火山) cause great damage to us. ____ (和……相比) the disasters, humans are weak. When a volcano ____ (爆发), hot lava ____ (像喷泉一样喷出) hundreds of meters into the air. When the lave comes to the town, people are in ____ (恐慌). They are ____ (担心) about their safety. ____ (不幸的是), many houses are _____. (全部焚毁).