V. Read the paragraph, then do the tasks given below. (2ms) Phong Nha - Ke Bang is a national park and UNESCO World Heritage Site in Quang Binh Province in the North Central Coast region, about 500 km south of Hanoi. It is situated in a limestone zone of 2,000 km2 in Vietnam and borders another limestone zone of 2,000 km2 in Laos. The core zone of this national park covers 857.54 km2 and a buffer zone of 1,954 km2. This national park was listed in UNESCO's World Heritage Sites in 2003. Phong Nha - Ke Bang is famous for its cave systems because it is composed of 300 caves. Sơn Đoòng Cave, which was discovered in the 2009 survey by British and Vietnamese explorers, is considered the largest cave in the world. A. T/ F sentences. 1. _______ Phong Nha - Ke Bang is in the south of Vietnam. 2. _______ It was recognized as a World Heritage in 2013. 3. _______ American explorers discovered Sơn Đoong Cave. 4. _______ Son Đoong Cave is considered the largest cave in the world. B. Answer the questions. 1. Where is Phong Nha - Ke Bang national park? ............................................................................................................... 2. How many caves does Phong Nha - Ke Bang have? ...............................................................................................................