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עמוד:19
^ i Complete the passage on the Student Work Page by choosing the correct form of the verb . A volcano is a mountain whose base is located below the earth ' s surface . The inside of a volcano is full of hot liquid rock . Volcanic eruptions < 1 j arecaused / cause when the inside of the earth moves . An active volcano is a volcano that might erupt . There are about 2 , 500 active volcanoes which ( 2 ) arefound / f ind throughout the world . Many of these volcanoes are located in the Pacific Ocean in an area called the "Ring of Fire . " Volcanic eruptions are dangerous . On May 18 , 1980 , a volcano erupted in the United States . Fifty-eight people were killed and over one billion dollars in damage < 3 > was caused / cause . In 1992 , a volcano erupted in the Philippines , causing 342 deaths . More than 250 , 000 people < 4 ) evacuated / were evacuated from their homes . Sometimes volcanic eruptions also ( 5 ) do / are done good things to the environment . When a volcano erupts , it throws out a lot of ash . After many years , the ash becomes soil , which ( 6 ) used / is used for farming . Volcanic eruptions also ( 7 ) change / are changed the earth ' s surface . For example , Crater Lake in the USA was formed after an eruption 6 , 600 years ago . One of the most famous eruptions occurred almost two thousand years ago in Italy . A volcano called Mt . Vesuvius erupted . Herculaneum , a city near the volcano , ( 8 ) buried / was buried under nearly 20 meters of ash . The ash ( 9 ) covered / are covered the entire city and ( 10 ) protected / are protected the buildings . Herculaneum has become an important archeological site . 3 Look at the pictures on page 17 and complete the following sentences with the passive form of the verb . Use the Student Work Page a A lot of damage ( cause ) by the storm . $ Houses ( destroy ) by the earthquake . < e ] Many people ( leave ) homeless after the disaster . < 3 The streets ( flood ) after the hurricane . @ Cars and trucks ( damage ) by the tornado . j ? The roof ( blow ) offthe house . It . Vesuvius Ancient city of Herculaneum Volcanic eruption
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