1) 1. Phong Nha - Ke Bang has a complex __________ structure with different varieties of stone. a) geologist b) geological c) geology 2) 2. _________ the caves and grottos in Phong Nha - Ke Bang National Park is the most popular activity for visitors. a) Explore b) Being explored c) Exploring 3) 3. Scientists working on the site found many ancient tools, tombs and pottery, and made some important __________ discoveries. a) archaeological b) archaeology c) archaeologist 4) 4. Scholars believe that there are still relics buried under the tomb and awaiting __________. a) excavation b) excavated c) excavate 5) 5. Lack of __________ of this heritage building has resulted in damage to its walls. a) preserve b) preservation c) preservative

Excercise 2

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