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  • Câu hỏi:

    It is mentioned in the passage that before the electric lamp was invented, ________.

    • A. 
      oil lamps and then candles were used
    • B. 
      candles and oil lamps appeared about the same time
    • C. 
      candles and then oil lamps were used
    • D. 
      people did not use any form of lighting in their houses

    Lời giải tham khảo:

    Đáp án đúng: C

    Dẫn chứng: For centuries homes were lit by candles until oil was found. Even then, oil lamps were no more effective than a cluster of candles. 

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