REVISION
I. Rewrite the sentences (perfect gerund and perfect participle)

1. Because I had worked too hard, I was very tired.

2. The villagers cleaned up the lake. They were praised for that

3. After I had finished my homework, I went out with my classmate.

4. Someone had dumped tons of untreated toxic waste into the river. The police suspected FYK company of doing it.

5. After we had locked the door carefully, we went to bed

6. We have done three tests today, so we are really tired.

7. Lan made a lot of mistakes in that presentation. But then she denied that.

8. He had not slept for two days; therefore, he wasn't able to concentrate.

9. After he had fallen from the horse back, he was taken to hospital and had an operation.

10. He finished all his homework and then he went to bed.

11. He donated a lot of money to environmental protection campaigns. He was admired for that.

12. We have advised you on how to cut down your energy use. We remember that.

13. Some scientists have distorted the effects of climate change. They were accused of that.

14. He told a lie to his parents. Then he regretted that.

15. After we signed an agreement to reduce carbon dioxide emissions, we were determined to help to reduce.

16. Because I had cycled to work, I became more responsible for the environmental issues.

17. He changed both his attitude and behaviors towards the environmental issues. We all admire him for that.

18. He had spent his childhood in Oslo so he knew the city well.

19. The fruit was expensive because it was imported.

20. They spoiled their son by providing too many material possessions. They now regret that.
21. After he had read the instruction, he snatched up the fire extinguisher.

22. He completed the book. Then he had a holiday.

23. The children stole the money. They admitted that.

24. After he had tied one end of the rope to his bed, he threw the other end out the window.

25. Because he had failed twice, he didn’t want to try again.