II. Choose the words given to fill in the blanks correctly. symbolise Debris collapsed permanent mudslide spectacles thermal radioactive 5. Linda wants to admire all the amazing ________round the world. 6 . The dam had almost ________ by the time the flood came. 7. Last week, twenty houses were swept away by the ______ . 8. ________was scattered across the river by the tornado this morning. 9. In the most serious case, noise pollution can cause _______ hearing loss. 6. 10. Some aquatic animals must change their habitats due to_______ pollution. 11. ________ endangers living creatures and environment. 12. The Big Ben in London was chosen to _____the United Kingdom.