23. Solar energy______by many countries in the world in the future A. use B. will use B. will be using D. Will be used 24. At this time tomorrow, I______an terview A. will be having B. will have C. Had D. Have 25. Coal is a_______energy A. nuclear B. solar C. biogas D. Natural 26. We should______low energy light bulbs A. use B. using C. used D. To use 27. The wind turns________to make electricity A. fans B. leaves C. turbines D. Kites 28. We________an Eng test tomorrow A. will have B. have C. has D. Had 29. Solar energy will_______to solve the problem of energy shortage A. use B. be used C. used D. Using 30. You should turn_______the lights when leaving the rooms A. on B. off C. right D. Left