Replace the of-phrase by the noun in the possessive case.
1. The friend of my mother.


2. The speech of the President.


3. The farm of old McDonald.

 
4. The  novels by D. Steel.

 
5. The hobbies of the children.


6. The poems by Burns.


7. The duties of a  man.


8. A conference of doctors.



9. The life of a bodyguard.


10. The policy of France.


11. The  streets of London.


12. The bank of the river.


13. The rays of the sun.


14. The way of nature.


15.  The teas of India. 

1. my mother's friend. 2. the President's speech. 3. old McDonald's farm. 4. D. Steel's novels. 5. the children's hobbies. 6. Burns's poems. 7. a man's duties. 8. doctors' conference. 9. a bodyguard's life. 10. France's policy. 11. London's streets. 15. India's teas. 12, 13, 14 вроде нельзя переделывать. Но если все нужно, то 12. the river's bank. 13. the sun's rays. 14. nature's way.