题目内容：
Save Energy At Home On the average, Americans waste as much energy as two-thirds of the world's population consumes. That's largely the____________(51) of driving inefficient cars, using inefficient appliances (设备), and living and working in poorly insulated (隔热) buildings. Then what can you do to____________(52) the situation?Buy energy-efficient products - Buy new appliances or electronics of the highest energy-efficiency rating. New energy-efficient models may cost more initially, but have a lower operating____________(53) over their lifetimes. The most energy-efficient models____________ (54) the Energy Star label, which identifies products____________(55) use 20-40 percent less energy than standard new products．According to the EPA (美国环境保护署), the typical American household can save about $400 per year in____________ (56) bills with products that carry the Energy Star.
Switch to compact fluorescent bulbs (荧光灯)－Change the three bulbs you use____________ (57) in your house to compact fluorescents. Each compact fluorescent bulb will keep half a ton of CO2 out of the air.____________ (58) its lifetime.____________ (59),compact fluorescent bulbs last ten times as long and can save $30 per year in electricity costs.
Set heating and cooling temperatures correctly － Check thermostats (温度自动调节器) in your home to make sure they are____________(60) at a level that doesn't waste energy.
Turn off the lights － Turn off lights and other electrical appliances such as televisions and radios when you're not____________(61) them. Install automatic timers for lights that people in your house frequently____________(62) to turn them off when leaving a room.
Let the sun shine in － The cheapest and most energy-efficient light and heat source is often right outside your window. On____________(63) days, open blinds (百叶穷窗)to let the sun light your home for free. Also remember that____________(64) entering a I room equals passive solar heating. Even on cold winter days, sun streaming into a room can raise the temperature by several____________(65). A．power
B．resul
C．way
D．work
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