8. May Day, … everybody has a day off, is considered an international holiday. A. when B. which C. that D. Both A and B 9. Working men are able to join the classes for … they pay fees. A. where B. which C. that D. Both A and B 10. When we use a word … meaning is not certain, we may be asked to define it. A. where B. which C. that D. whose 11. The police have been looking for the reason … the accountant corrupted the amount of over eight billion dong. A. where B. which C. that D. why 12. The river along … I used to walk in the childhood is going to be made deeper. A. where B. which C. that D. Both A and B 13. Those … do not get along with everybody feel tasteless in their life. A. who B. which C. that D. whom 14. The sanctuary … was famous for innumerable birds is nearly deserted nowadays. A. where B. which C. that D. Both B and C 15. The director encouraged the guard … the gangsters had threatened to kill. A. whom B. which C. that D. Both A and C