III. Combine the following sentences, using present participle or past participle. 1. The river is liable to flood in winter. It flows through the town center. 2. The ancient pottery was discovered by workmen. They were digging in the street. 3. Most houses have problems with damp. They were built more than a hundred year ago. 4. The manager noticed I had dropped my purse and called after me. 5. Only a small fraction of the eggs actually hatches and survive to adulthood. The eggs are laid by a fish. 6. I was awakened by the sound of laughter. It came from next door to mine at the hotel. 8. Although he smokes heavily, he refuses to go for a check-up. 9. Jenny was inexperienced. She didn't know what to do. 10. The solicitor was going through the archives. He found an intriguing piece of information. H. The firefighter tried to rescue those trapped in the burning building. He was injured. 12. I couldn't say where we were. I wasn't good at reading maps. 13. Peter didn't phone me, as he was aware of the alterations to the plan. 14. I was asked to participate because my boss realised my enthusiasm.