We really can "Change the World” with just one light bulb. Don’t leave lights on when (23) ____ is in the room. If you are going to be (24) ______ the room for more than five minutes, turn off the light. Where possible, use (25) _______ bulbs. Therefore, they last for years and years without burning out. Don’t leave your computers, TVs, radios on when you are not using them. Don’t keep the refrigerator door (26) _____ longer than you need to. Saving electricity (27) ______ saves money, but it also saves the planet. Every time you turn off the lights, you create a little pollution. So saving electricity doesn’t just put money in our pocket, it (28) ______ keep the air and water clean, too. 23. A. someone B. nobody C. anybody D. nothing 24. A. into B. away from C. out of D. in front of 25. A. energetic -saving B. saving-energy C. energy-savings D. energy-saving 26. A. open B. opened C. to open D. opening 27. A. both B. not only C. either D. and 28. A. makes B. allows C. helps D. gets