题目内容：
根据下列文章,请回答题。Save Energy At HomeOn the average, Americans waste as much energy as two-thirds of the world's population consumes. That's largely the__________ (1) 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 __________ (2) 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__________ (3) over their lifetimes. The most energy-efficient models __________ (4) the Energy Star label, which identifies products__________ (5) use2040 percent less energy than standard new products. According to the EPA(美国环境), the typical American household can save about $400 per year in __________.(6) bills with products that carry the Energy Star.
Switch to compact fluorescent bulbs (荧光灯)－－Change the three bulbs you use (7) in your house to compact fluorescents. Each compact fluorescent bulb will keep half a ton of CO2 out of the air__________(8) its lifetime. ___________(9), 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__________(10) 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 __________ (11) them. Install automatic timers for lights that people in your house frequently__________ (12) 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 __________ (13) days, open blinds (百叶窗)to let the sun light your home for free. Also remember that__________ (14) entering room equals passive solar heating. Even on cold winter days, sun streaming into a room can raise the temperature by several __________ (15). A．power
B．result
C．way
D．work
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