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When Khang went to Ninh Binh last year, he had a day tour to Hoa Lu, an ancient ______ of Vietnam.

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The project was done with the aim of raising public ______ of protecting the environment.

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It is on the Galápagos Islands, Ecuador that unique flightless sea birds such as ______ can be found.

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______ by the sea, the country has the advantage of having a large coastal area.

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Hội An Town was recognized as a World ______ Site by UNESCO in 1999.

The Imperial ______ of Thăng Long was first built in the 11ᵗʰ century during the Lý Dynasty.

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The Asian elephant is considered to be a(n) ______ species by the WWF (World Wildlife Fund).

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The city ______ run a marketing campaign to attract more foreign tourists next year.