... accounts (1)……………… .10 percent to 15 percent of the electricity bill. However, this amount can be reduced by replacing an ordinary 100 -watt light bulb (2)………………….an energy-saving bulb. These ... light bulb (2)………………….an energy-saving bulb. These bulbs use a quarter of the electricity of standard bulbs and (3)…………………eight times longer. Therefore consumers can (4)…………………about US$7 to US$21 ... Trung………………………………………………………………………………………………Bài giảiI. 1.D, 2. D, 3. C, 4. B, 5. A, 6. C, 7. A, 8. B, 9. D, 10. B, 11. A, 12. CII. 1. wonderful, 2. interested, 3. celebration, 4. carefullyIII. 1. goes,...