76-85. Fill in each blank with ONE suitable word to make a meaningful passage. (10 pts)THE TUNGUSAKA EXPLOSION      At 7.17 in the mornin...

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76-85. Fill in each blank with ONE suitable word to make a meaningful passage. (10 pts)THE TUNGUSAKA EXPLOSION      At 7.17 in the morning, on the 30^th of June 1908, there was an enormous explosion in the Tungusaka region of Siberia. It destroyed around 40,000 trees in a circular area of about 15,400sq km. the force of the explosion (76)…………felt all over the world.      That might in Siberia was known as the ‘White Night’. It did not get dark because the sky was filled (77)……………..bright silvery clouds. Even in London it was possible to read at midnight because the sky was (78)………….light. At the same time in other parts of Europe, photographs could be (79)…………..without the use of a flash.      How did it happen? Even today, nobody knows for sure. Some suggested that it was a UFO crash. (80)…………..thought that it was a meteorite. But when things fall to Earth from (81)…………, they leave huge holes in the ground, called craters – and there was no craters in Tungusaka.      The (82)………..widely accepted explanation today is that it was a comet. A comet is a huge ball of dirty ice (83)……….files through space, trailing a tail of dust behind it. If a piece of a comet broke off and entered the Earth’s atmosphere, it would heat (84)……………and explode before it actually landed. The explosion would be huge, but it (85)………….leave very little evidence of itself behind. Possibly just a cloud of silver dust.