Choose the best answer. 1.No one is able to explain the __________ of the old customs. A.beginning B.origin C.reason 2.There are always regional __________ in every country. A.differs B.different C.differences 3.__________ of your two sisters is studying in Australia? A.Who B.What C.Which 4.Although there are cultural __________ between ethnic groups, they still keep the identity of their own culture. A.changes B.exchanges C.relations 5.The 54 ethnic peoples of Viet Nam are __________, but they live peacefully. A.diverse B.similar C.unlike 6.Which __________ of our country would you most like to live in? A.place B.section C.part 7.Most ethnic minority peoples are good __________ farming techniques. A.at B.for C.to 8.Chaul Chnam Thmey is the biggest __________ of the Khmer people. A.festival B.ceremony C.practice