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  1. Choose the best answer.

  1. Where did oil production begin?

  1. in the Caspian region;

  2. in Saudi Arabia;

  3. in Syberia.

  • The biggest oil producer in the mid 19th century was

    1. America;

    2. Azerbaijan;

    3. China.

  • Crude oil production increased by the end of the 20th century due to

    1. manufacturing of lightning lamps;

    2. automobile era;

    3. extracting kerosene.

  • Digital seismology enabled to

    1. locate underground pools of oil more carefully;

    2. locate underground pools of oil with less cost;

    3. locate underground pools of oil more exactly.