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  3. Most volcanoes are quiet. They rest【B1】______ for hundreds of years. No one pays much attention to them. Mount St. Helens was on

Most volcanoes are quiet. They rest【B1】______ for hundreds of years. No one pays much attention to them. Mount St. Helens was on

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问题      Most volcanoes are quiet. They rest【B1】______ for hundreds of years. No one pays much attention to them. Mount St. Helens was one of these volcanoes. Until 1980, it was a beautiful【B2】______ area. Its last eruption had been 123 years ago. No one was worried about another one. In March 1980, Mount St. Helens began to make noises. At first, there were some shaking movements. Then, small eruptions occurred. Some【B3】______ left immediately. Others felt there was no danger. But on the morning of May 18, 1980, the mountain【B4】______ its top. With the power of twenty-five【B5】______  bombs, Mount St. Helens exploded. Clouds of dust and ash rose more than twelve miles into the sky. Rocks and mud 【B6】______ down on the slopes. Unfortunately, many people were still living,【B7】______ or working in the area. Over forty people lost their lives. Others were【B8】______ .Robert Baker was fishing with his family when the explosion happened. He reported that the morning of May 18 was strange. No birds were singing. The air was still. Then, he saw a large black cloud coming down towards them. In minutes, day turned into night.【B9】______ .
     All the time, hot ash was raining on them. But other people were not so lucky. David Johnston,   【B10】______ . At 8:31 a.m., he radioed "This is it! "He was never heard again. Mount St. Helens is peaceful now. But its slopes are empty.【B11】______  
【B4】
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