Choose the proper word. 1. Different hydrocarbon fractions (make, make up) petroleum. Large resources ofoil and gas (make, make up) a countrypowerful and politicallyindependent. 2. Aflowofelectronsis anelectric (current, currently (Current, Currently) oil is being produced all over the world. (Current, Currently) financial crisis is being held around the world. 3. Oil and gas are important (sources, resources) offuel. Oil and gas are the major natural (sources, resources) ofenergy. Siberia is rich in mineral (sources, resources) such as: oil, gas, gold and others. 4. The first (commercial, industrial) well was drilled in this region in 1980. Living standard in the developed (commercial, industrial) countries is high. (Industrial, commercial) nations should paymuch attention to air pollution control. 5. The early wells were all drilled by the cable tool (ударно-канатное бурение) method in which adriller had to (raise, rise) and drop a heavytool. and gas(raise, rise) to the surface bymeans ofreservoir pressure. 6. Oil industryhas to (solve, decide) a lot ofenvironmental problems. The engineers (solved, decided) to drill a well to the depth of 100 m. Petroleum Engineering