I. Read the following passage and choose the best answer for each blank. VietNam is a multicultural country with 54 ethnic groups. The Viet (King) people account (1)……….86% of the country’s population and mainly inhabit the Red River delta, the central coastal delta, the Mekong delta and major cities.The (2)……….53 ethnic minority groups, totaling over 8 million people, are scattered over mountainous areas (covering two- thirds of the country’s territory) (3)….from the North to the South. Among ethnic minorities, the (4)……….populated are Tay, Thai, Muong, Hoa,Khmer, Nung…..with a population of around 1 million each, (5)……….the least populated are Brau, Roman, Odu with several hundred people each. The Viet people (6)……….in establishing a centralised monarchy right in the 10th century.  The Cham people once boasted (7)……….flourishing culture early in their history. The Tay, Nung, and Khmer peoples had reached high levels of (8)……….with the presence of various social strata. The Muong, Hmong, Dao, Thai peoples…..gathered under the rule of (9)……….tribal heads. Many ethnic groups divided their population into social echelons, especially those (10)……….lived in mountainous areas. 1. A. with           B. for                C. of                D. on 2. A. other           B. another           C. others           D. another's 3. A. coming      B. lengthening      C. leaving           D. spreading 4. A. much           B. many           C. most           D. more 5. A. while           B. when           C. though           D. thus 6. A. managed      B. achieved      C. succeeded      D. conquered 7. A. the           B.a                C. an                D. some 8. A. development                B. establishment     C. operation                     D. contribution 9. A. social           B. minor           C. urban           D. local 10. A. which      B. who           C. whose           D. what