There are many ways to cut the (19)_____ of your power bill in your home. Take a look at the way we choose computers (a laptop or a desktop computer). A laptop is a computer that is small enough (20)_____ carried around easily and is flat when closed. While a desktop computer is the one that fits on a desk but that is not easily moved from place to place. Regardless of their convenience difference, choosing a laptop or a desktop computer may result in a significant difference in energy (21)_____ . I’m writing this by using a laptop with power (22)_____ features switched on – using around 50 watts maximum. Back some years ago, I would work with a desktop computer with a 17″ CRT screen – around 300 watts all told. The following are some rough (23)_____ based on coal fired power generation for just the computer aspect: - Laptop = 50w x 10 hours a day x 365 days = 182.5 kilowatt hours - Desktop = 300w x 10 hours a day x 365 = 1095 kilowatt hours In the case of coal fired electricity, each kilowatt you save not only puts (24)_____ back into your pockets, but also avoids up to 1.5 pounds of carbon dioxide emissions being generated. 19. A. energy B. costs C. households D. power 20. A. having B. being C. to be D. to have 21. A. efficiency B. affection C. production D. effect 22. A. consuming B. lighting C. saving D. sleeping 23. A. innovations B. productions C. settings D. calculations 24. A. cash B. debt C. product D. economy