I. Underline the best option to complete the passage. (1.5 pts) I'm happy to share with you some good news about my village. There have been some changes (1. since/ for/ after)your visit last year. Last week I came back to my village and was really surprised. You know what? The lake is not (2. pollute/ polluted/ pollutant) anymore. The factory has installed a new filtration system to treat the (3. chemistry/ chemist/ chemical) waste. I saw lots of small fish in the lake and wild ducks swimming in the water. Besides, they have planted trees around the factory to (4. increase/ reduce/ fall) air pollution. Since some villagers are in the habit of littering, people have placed dustbins in various places. This has (5. resulted/ caused/ led) in a much cleaner environment. My grandparents say that at weekends the villagers also go around the village together to (6. take/ get/ collect) rubbish.