D. preservation
Giải bởi qa.haylamdo.com
Giải thích: maintenance (n): sự giữ, sự duy trì
building (n): sự xây dựng, toà nhà foundation (n): sự thành lập, sự sáng lập
destruction (n): sự phá hoại, sự phá huỷ preservation (n): sự giữ, sự bảo tồn
=> maintenance = preservation
Tạm dịch: Việc duy trì những lâu đài cổ này phải tốn rất nhiều tiền.
Chọn đáp án là: D
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