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Câu hỏi:
What can we do to spend less on lighting?
- A. replace an energy-saving bulb.
- B. buy small light bulbs
- C. replace an ordinary 100-watt light bulb with an energy-saving bulb.
- D. use big light bulbs
Lời giải tham khảo:
Đáp án đúng: C
Dẫn chứng: For most North American households, lighting accounts for 10 percent to 15 percent of the electricity bill. However, this amount can be reduced by replacing an ordinary 100-watt light bulb with an energy-saving bulb.
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