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--- Lesson 88 Trapped in a mine |
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--- First listen and then answer the question. |
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--- Why is the rescue taking so long? |
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Six men have been trapped in a mine for seventeen hours. |
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If they are not brought to the surface soon they may lose their lives. |
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However, rescue operations are proving difficult. |
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If explosives are used, vibrations will cause the roof of the mine to collapse. |
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Rescue workers are therefore drilling a hole on the north side of the mine. |
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They intend to bring the men up in a special capsule. |
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If there had not been a hard layer of rock beneath the soil, |
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they would have completed the job in a few hours. |
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As it is, they have been drilling for sixteen hours and they still have a long way to go. |
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Meanwhile, a microphone, which was lowered into the mine two hours ago,has enabled the men to keep in touch with their closest relatives. |
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Though they are running out of food and drink, |
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the men are cheerful and confident that they will get out soon. |
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They have been told that rescue operations are progressing smoothly. |
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If they knew how difficult it was to drill through the hard rock, they would lose heart. |
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--- end |