[originaltext]　　Indonesia’s Mount Merapi has erupted with its biggest explosion

　　Indonesia’s Mount Merapi has erupted with its biggest explosion in more than a century, killing at least 70 people, (5) burning down homes and blanketing the region in white ash. Authorities said Friday this latest in a series of eruptions over the last 11 days was the most ferocious yet. (5)750-degree (Celsius) gas flowed down the mountainside in a thunderous roar. The heat was so intense that clothes and blankets were fused to the injured as they fled for safety. (6) The death toll from the eruptions has now risen to about 120 and is expected to increase as rescuers pull bodies out of the ash and broken rocks. Volcano experts said the Friday blast was the biggest since the 1870s. (7) With the unpredictability of the volcano, authorities widened the danger zone around the mountain to 20 kilometers
　　5.  Which of the following is probably the result of the eruption of Mount Merapi?
　　6.   How many people have been killed by the disaster?
　　7.  Why did Authorities widen the danger zone?