Trắc nghiệm: Once ______ as the World Natural Heritage by UNESCO. Phong Nha – Ke Bang National Park attracts a great number of visitors worldwide. | Gửi trắc nghiệm |
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Trắc nghiệm: Once ______ as the World Natural Heritage by UNESCO. Phong Nha – Ke Bang National Park attracts a great number of visitors worldwide. | Gửi trắc nghiệm |