16. _____of your two sisters is studying in Australia? A. Who B. What C. Which D.Why 17. Most ethnic minority peoples are good ___ farming techniques. A. with B. for C. to D. at 18. Chaul Chnam Thmey is the biggest __________ of the Khmer people. A. practice B. ceremony C. festival D. population 19. The US is a ___ country with over 80 ethnic groups. A.multi-cultural B.bi-lingual C.rich D.ethnic 20. Both my brother and I help __ our family’s goats. We feed them on the pastures by the edge of the village. A. herds B. to herd C. herding D. to herding 21. A tent can be__ pulled down and transported than a ger. A. more easily B. most easily C. easier D. as easily 22. Bob ran ____ than his classmates. A. fast B. more fastly C. quicklier D. more quickly 23. Tom sang _____ than the other kids. A. gooder B. better C. well D. the best 24. I speak English __in my class. A. more fluent B. most fluent C. most fluently D. the most fluently