12. A severe tropical ...................... is called a typhoon. A. drought B. rain C. flood D. storm 13. As soon as the floodwater ...................... down, people ........................ their houses. A. went - cleaned B. had gone – cleaned C. went - had cleaned D. had gone – had cleaned 14. If I were you, I ..................... do something to prevent him from littering. A. would B. did C. will D. do 15. Earth .................. by the gravity of the Sun and orbits around it. A. holds B. is held C. is holding D. held 16. By the time we ........................ to the cinema, the film had started. A. gets B. had got C. has got D. got 17. When the policeman came there, the robber .................. A. had left B. has left C. left D. was left 18. All people who were without homes in the flood were provided with .................. accommodation. A. short B. temporary C. present D. instant 19. If you were the president, what ..................... you do to help the environment? A. will B. did C. would D. do 20. The Maori in New Zealand greet each other by ........................ their noses. A. touching B. punching C. blowing D. rubbing 21. The village’s drinking water ........................ with poisonous chemicals since the factory came into operation. A. contaminates B. is contaminated C. has contaminated D. has been contaminated 22. If the factory .................. dumping poison into the lake, all the fish and other aquatic animals will die. A. continues B. continued C. will continue D. continue