most mostly almost utmost

Complete the following passage by choosing the best option, A, B, C or D.

   Energy is very important in our modern life. People use energy (5)__________ transportation, cooking, heating and cooling rooms, manufacturing, lighting, and entertainment. (6) __________ energy nowadays comes from fossil fuels – petroleum, coal, and natural gas. (7) __________, burning fossil fuels causes pollution. Also, if we don’t find new kinds of energy, we will (8) __________ all the fossil fuels in the near future.

Question 6: