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Oxford discover 6
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Especially when they´re needed to cross a __________.
Waterway
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... but Earth´s ______ geography often makes that ______.
varied / problematic
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But today they commonly use strong steel ________.
Cables
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Engineers have been using bridges and tunnels to go over, under, or through these _________.
Obstacles
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The ________ bridge, the arch bridge, and the suspension bridge.
Beam
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When the Channel Tunnel was built, to ______ the United Kingdom and France...
Link
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These bridges were often __________ by ropes,
Suspended
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And many other landforms that have to be __________.
Overcome
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In the past, engineers often used _______ to blast tunnels through rock.
Explosives
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It depends on the ___________.
Situation
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Beam bridges are often used for short ______ of distance,
Spans
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Okay!
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