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on holiday in prison
on air (in broadcasting) in bed
14 Explain the use of articles in the following text.
A first-time visit can be educational as well as confusing. Most
drilling rigs are large and noisy and, at times, the people who work on
them perform actions that don’t make much sense to an uninitiated
observer. A drilling rig has many pieces of equipment and most of it is
huge. But a rig has only one purpose: to drill a hole in the ground.
Although the rig itself is big, the hole it drills is usually not very big
— usually less than a foot (30 centimetres) in diameter by the time it
reaches final depth. The skinny hole it drills, however, can be deep:
often thousands of feet or hundreds of metres. The hole’s purpose is to
tap an oil and gas reservoir, which more often than not lies buried
deeply in the earth.
15 Fill in the articles where necessary.
….Caspian Sea, ….Texas, ….Gulf of Mexico, ….deepest
operational platform, …. Western Africa,….Everest, ….earth, …Lake
Erie, .…last face.
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