完形填空。 Oil is so important that it is som
题型：完形填空
问题：
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| Oil is so important that it is sometimes called "black gold". Almost half our 1 comes from oil. We use it to run our cars and factories and to 2 our homes, offices and schools. Many everyday things are made from oil. Your shirt may have oil in the material. The soap you 3 your hands with might also be made from oil. Children's plastic toys are made from oil. Oil is 4 to find, because it is trapped (陷入) deep under the earth. Today, however, we have many 5 to find oil. One tool measures (测量) the pull of gravity (吸力). Places where gravity is weaker are more likely (很可能) to have oil. 6 tool measures sound waves (波). Sound waves 7 through different kinds of rocks at different 8 . We can use them to find the reeks that have oil in them. We need 9 oil. and we are using up the oil wells (井) we know about. 10 we must find new ways of looking for this "black gold". Can you do anything for it? | ||||
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