Question

find the word from passage which mean make a hole
. To find out how deeply the oil is buried they need to know how far under the surface the rock is. If

everything seems hopeful the men decide to drill down through the rock. In this way they find out whether oil

really does lie underneath it. Often this test – well, as it is called, is far away from any town and there is much

work to do before any drilling starts. Houses and roads must be built for the people coming to drill the test –

well. Then the big derrick that carries the drill must be put up. This derrick is a strong framework of steel about

45 meters high. The drill is raised and lowered from inside the derrick.

Answer 1

Answer:

drilling

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