Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks. Phong Nha Cave, located in Vietnam’s Phong Nha-Ke Bang National Park, is an (24) ______ natural wonder. (25) ______ by a local farmer in the 16th century, it’s one of the world’s oldest and largest cave systems. (26) _____ encounter majestic dripstones when exploring its winding passages. Recognized as a UNESCO World Heritage Site, Phong Nha Cave is ...

Phong Nha Cave, located in Vietnam’s Phong Nha-Ke Bang National Park, is an (24) ______ natural wonder. (25) ______ by a local farmer in the 16th century, it’s one of the world’s oldest and largest cave systems. (26) _____ encounter majestic dripstones when exploring its winding passages. Recognized as a UNESCO World Heritage Site, Phong Nha Cave is valued (27) ______ its ecological importance. Legends abound about its hidden treasures, drawing travellers who want to explore its depths by boat. It captivates (28) ______ tourists and scientists, offering insight into ancient geological processes.