переделать предложения с активного в пассивный залог по английскому языку
1 He wrote this book in the 19th century.
2 They were playing tennis from four till five.
3 They have made a number of important experiments in this laboratory.
4 Livingstone explored Central Africa in the 19th century
5 By the middle of autumn we had planted all the trees.

12. I don't like this place, I don't think we will pleasantly spend time Here 13. Hush! Don't Wake the baby. 14. In recent times, their knowledge has increased significantly. 15. What is the best way to learn a foreign language? 16. When we finally approached the village, it was dark. 17. If you want to contact him on this issue, call him 18. I am willing to help you but don't know if I can do it. 19. Give me your word not to risk it, if you find yourself in danger. 20. How about to live in the summer in the village? 21. Come see me at a convenient time for you. 22. I will gladly look after Your dog. 23. When are you going to get rid of old Newspapers and magazines?

a) Cambridge is formed from a variety of institutions, isn't it?

b) All the colleges are self-governing institutions within the university, aren't they?

c) It does not have a main campus, does it?

d) The university also operates eight cultural and scientific museums, doesn't it?

e) Cambridge has educated many prominent scientists, politicians, lawyers,

philosophers, hasn't it?

f) There are 31 colleges with 18,271 students with 9,823 academic and

administrative staff members at Cambridge University, aren't there?

g) No college is as old as the university itself, isn't it?

h) Cambridge is now the only remaining United Kingdom university with female only colleges, isn't it?