Răspuns:
1) Every day, I recycle waste.
2) Last night, while I was watching, it suddenly started raining heavily.
3) We often go for nature walks, and we have spotted several endangered species recently.
4) I didn't use plastic bags for a year now.
5) While we hiked in the mountains last week, the pollution in this city has significantly increased.
6) Tomorrow morning, I will plant a tree in our garden.
7) The factory workers protested against the pollution and hiked in the mountains last week.
8) I have been cleaning the house all day.
9) I'm tired because I have been watching TV, and by the time you arrive, we will have finished the presentation.
