| 1 | Dinosaurs have been extinct for millions of years. | |
| 2 | Our zoos will most likely fill with animals that are now extinct. | |
| 3 | Many beautiful fish are fast disappearing because of the severe pollution. | |
| 4 | If we continue to destroy the countryside many more animal will become extinct. | |
| 5 | But today, fox hunting itself is on the verge of becoming an endangered species. |