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Fill in the blanks:

i. ……… is the liquid fuel formed by the decomposition of organic substances.

ii. The underground mineral oil is extracted through ……… .

iii. Mineral oil is also known as ………….. or ………….. .

iv. ………….. are the preserved remains of dead organisms in rock.

v. Coal can be formed from ………….. .

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i. Mineral oil

ii. oil wells

iii. petroleum, crude oil

iv. Fossil

v. Fossils

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