Use one of the tenses: present indefinite, past indefinite, present continuous, past continuous.

2. anne was sitting in the room when we returned 3. alice read when we came in? 4.the plane was flying over the sea. 5. quickly getting dark. 6. they rode all day? 7. the rising of the sun, the birds were singing. 8. students are read. 9. while she read, the conversation continued. 10. give played while she was cleaning. 11. we crossed the atlantic for eight hours. 12. yesterday, tom and jim played tennis. 13. they began at ten and finished at twelve. 14. what did they do at eleven? 15. at eleven they just played tennis. 16. at this time last year he lived in england. 17. what did you do yesterday at nine? 18. tom was preparing dinner. 19. tom prepared dinner. 20. tom got burned when preparing dinner21. i saw jane, she prohulyuvalasya in the park. 22. he sat in a chair and read. 23. when she awoke, it rained. 24. when he was working in the garden, then ill. 25. ann took a shower when the phone rang

Загрязнение окружающей среды. environmental problems have become one of the most urgent problems of modern society. more and more people suffer from air and water pollution. nature also suffers from land and nuclear pollution. the reasons for such environmental problems are numerous. among them increasing number of cars in the streets, factory waste, millions of cut down trees, destroyed habitats of animals, contaminated rivers and seas. all these problems mainly arise due to human careless activities and gradually destroy our planet. if we look closely, we’ll notice that not only one city is under danger, but the majority of world population. fortunately, there are many ways to suspend these problems.