$IV$
1. Having watched the documentary about wildlife, I made a donation to an environmental society.
2. Having eaten my evening meal, I decided to go for a walk.
3. Having spent the whole day cleaning up my room, I needed to take a shower and have a rest.
4. Having managed water resources irresponsibly, the authorities had to deal with water shortages in the region.
5. Having read the stories about people who reduced their carbon footprint, we started to change our daily consumption habits.
6. Having been told about the dangers of chemical fertilisers, the farmers turned to bio-fertilisers.
7. Having finished all my homework, I watched my favourite film on TV.
$@bangtann $