Choose the one option that best completes the passage.

Saving energy means saving money. One way to save money is to (1) _______ incandescent lights with fluorescents. This can result in a savings of more than 50% (2) _______ your monthly lighting costs. When it’s time to replace old appliances, it’s wise to spend a bit more for an energy-efficient (3) _______ , and be sure that you are taking advantage of (4) _______ settings already on your current refrigerator, dishwasher, washing machine, or dryer. Windows provide another opportunity to (5) _______ your energy costs. Caulk old windows that might be leaky to prevent drafts, and choose double-paned windows (6) _______ you’re building an addition or replacing old windows. (7) _______ areas of your home or apartment offer opportunities to save energy and money. The results are significant and are (8) _______ worth the effort.