Rewrite the sentences using perfect participles.
1. After-we read the report on how the burning of petrol in cars contributes lớn climate change, we decided lớn sell our xế hộp and get a bicycle instead.
2. After we talked with the environmentalist, we changed our attitude lớn nature.
3. After we had learnt that humans are responsible for global warming, we were determined lớn reduce our carbon footprint. ( Lưu ý: nếu như vô câu đem trợ động kể từ have, has, had đứng trước động
từ đua vứt luôn)
4. After the students had learnt about the benefits of recycling and reusing, they started collecting waste paper, bottles, and cans lớn recycle and reuse.
5. After Ha had read some documents about Green Earth, she decided lớn join the organisation.
6. After she replaced all the light bulbs in her house with LED lights, she saved a lot of money on her electricity bills.
7. After Quang attended a conference on nature conservation, he became more involved in environmental activities.