1 That rabbit is a big hole.
a building b digging cchasing d hunting
2 The falcon is
its babies with
insects.
a protecting beating cfeeding d chasing
3 The bear wants to eat. It's
that
rabbit.
a hunting b playing with
c protecting d feeding
4 Those animals are
a new home.
a eating b chasing chelping d building
5 The frog is hungry. It's
some
food.
a fighting b building ceating d feeding​

а) 1. had planned - (past perfect), played - (past simple)
 2. had increased - (past perfect), reduced - (past simple)
б) 1. are being made - (present continuous passive)
2.  is increased - is offered - (present simple passive)
а) 1. В течение 40 лет после 1945 года страны Восточной Европы имели плановую экономику, в которой рыночные механизмы играли лишь незначительную роль.
2. Прибыль выросла немного, поэтому мы сократили наши последующие инвестиции.
б) 1. Во всех городах решения о распределении средств принимаются ежедневно, в основном, с использованием рыночно-ценовых механизмов.
2. Когда поставки увеличиваются, большее количество предлагается по данной цене.

a)1. I’m writing a composition now. 2. I`m not drinking milk now. 3. I`m going for a walk after dinner. 4. I don`t go to the theatre every Sunday. 5. He isn`t reading now. 6. He`s playing now. 7. Is he playing now? 8. My mother works at a factory. 9. My aunt doesn`t work at a shop. 10. Do you work at an office? 11. My friend lives in St. Petersburg. 12. My cousin doesn`t live in Miami. 13. The children aren`t sleeping now. 14. The children play in the yard every day. 15. They don`t go to the stadium on Monday. 16. She reads in the evening. 17. She doesn`t read in the morning. 18. She isn`t reading now. 19. So your father works at this factory? 20. Are you playing chess now? 21. Look at the sky: the clouds are moving slowly, the sun is appearing from behind the clouds, it is getting warmer. 22. How is your brother? -  He is not well yet, but his health improves day after day. 23. Listen! Who is playing the piano in the next room? 
b) 1. They read many books. 2. Do they read many books? 3. They don`t read many books. 4. The children are eating soup now. 5. Are children eating soup now? 6. The children aren`t eating soup now. 7. Do you play volley-ball well? 8. When do you play volley-ball? 9. What does Nick do in the evening? 10. Does he go to the cinema in the evening? 11. We don`t dance every day. 12. Look! Kate is dancing. 13. Does Kate sing well? 14. Where does he go in the morning? 15. He doesn`t sleep after dinner. 16. My granny sleeps after dinner. 17. When do you sleep? 16. Nina isn`t sleeping now. 19. Where does John live? - He lives in England.