2. Choose the option (A, B, or C) that best completes each numbered blank in the passage. (10 points)                  Fossil fuels are burned to generate most of the energy used to drive our cars or light our house. Today, oil, coal and natural gas still provide 80% of our energy (6) ..........However, burning oil, coal and gas (7) .......... the current global warming (8) ..........than before. Fossil fuels produce (9) ........carbon dioxide when they are burned. That's why it's time to find cleaner (10) ......of energy. 6. A. needs                                       B. sources                     C. uses 7. A. make                                       B. makes                       C. are making 8. A. worsen                                    B. worse                        C. worser 9. A. many                                       B. much                        C. a lot of 10. A. sources                                  B. resources                  C. amounts