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10. Wave energy is a source of energy.
A. environmental friendly B. environmentally friendliness
C. environment friendly D. environmentally friendly
11. Alternative sources of energy developed in the near future.
A. has been B. will be C. is D. was
12. She cooking in the kitchen at 7 PM tomorrow.
A. will B. is C. will be D. be
13. Some new energy-saving bulbs in the dining room.
A. will be put B. will put be C. will put D. will be putting
14. What should we do to electricity?
A. take B. save C. cut D. waste
15. The wind, the sun, and the wave are some types of sources of energy.