IX. Write complete sentences about the Citadel of the Ho Dynasty, using the words given in their correct forms. You can add some more necessary words, but you have to use all the words given.
46. Ho Dynasty Citadel / listed / UNESCO World Heritage Site /2011
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47. it / built / 1397 / unique architecture / beautiful natural base
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48. Ho Dynasty Fortress / Thanh Hoa Province / only one ancient stone Citadel / left / Southeast Asia
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49. moreover / Ho Fortress / built / many heavy stone packs / some of which / weigh / more than 20 tons
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50. inside / fortress / archeologist / find / stone balls for cannon / one / oldest cannon balls / Asia
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