Ex2
1. was accused
2. giving
3. receiving
4. asking
5. switching
6. having broken
7. dumping
8. promoting
Ex3
1. having been drunk
2. After seeing some reviews of that hotel
3. Having fallen onto the road
4. hugging him tightly
5. being aware of their advantages
1. emissions
2. infectious
3. ecological
4. disruptions
5. extinction
6. disappearance
7. diversity
8. significantly
9. lawmakers
10. deforestation
Ex4
1. He was accused of having stolen the money.
2. She stood up suddenly, upsetting a glass of wine.
3. Suspecting nothing, he walked right into the trap.
4. Having finished all his homework, he went to bed.
5. Having seen the film before, I didn't want to go to the cinema.