9. Although there are cultural (changes/ exchanges/ relations) between ethnic group, they still keep the identity of their own culture. 10. The 54 ethnic peoples of VN are (diverse/ similar/ unlike), but they live peacefully. 11. Which (place/ section/ part) of your country would you most like to live in? 12. Most ethnic minority peoples are good (at/ for/to/on) farming techniques. 13. Chaul Chnam Thmey is the biggest (festival/ ceremony/ practice) of the Khmer people. 14. The US is (a/an/the/0) multi-cultural country with over 80 ethnic groups. 15. So many people nowadays are (addicted to/ bored with/ worred about/ afraid of) computers and mobile phones. They use them a lot. 16. (Sports/ Leisure activities/ Riding a bike/ Flying a kite) can make you relaxed. You enjoy them in your free time. 17. The volunteers have to work much (as hard as/ more hard than/ harder than/ the hardest) usual to save the dying animals from the forest fire. 18. In 2010, Ha Noi (celebrated/ commemorated/ worshipped/ remembered) its 1000th anniversary. 19. The (preservation/ procession/ performance/ song) of quan ho singing has been recognized as a world heritage. 20. Tet is an occasion for family (visitings/ gatherings/ reunions/ seeings