Read the text carefully, then do the tasks. Located in DuyXuyen district, Quang Nam province, about 69km from Da Nang City and 20km from TraKieu ancient capital, My Son Sanctuary is the complex of numerous Champa tower-temples in a valley roughly two kilometers wide, surrounded by two mountain ranges. This used to be a site of religious ceremony for kings of the ruling dynasties of Champa, as well as a burial place for Cham royalty and national heroes. My Son Sanctuary is regarded as one of the main religious centers of Hinduism in Southeast Asia and is the foremost heritage site of this nature in Vietnam. Notably, among 225 Cham vestiges that are founded in Vietnam, My Son possesses 71 monuments and 32 epitaphs, the content of which is still being studied. My Son Sanctuary is often compared with other historical temple complexes in Southeast Asia, such as Borobudur of Java in Indonesia, Angkor Wat in Cambodia, Bagan of Myanmar or Ayutthaya in Thailand. My Son Sanctuary was honored as one of the UNESCO World Heritage Sites at the 23rdsession of the World Heritage Committee in 1999. Based on architectural remains, My Son perhaps began construction in 4th century. It is perhaps the longest inhabited archaeological site in Indochina. Although time and wars have turned numerous tower-temples into ruins, sculptural artifacts and architectural remains still reflected golden age of Cham fine arts history. These masterpieces have marked flourishing periods of Champa culture and architecture as well as in Southeast Asia. Answer the following questions. 7. How far is it from Da Nang to My Son Sanctuary? 8. What did My Son use to be? 9. How many Cham vestiges are there in My Son? 10. When was My Son recognized as a World Heritage Site by UNESCO?