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Вместо оборотов с предлогом of образуйте обороты с существительными в притяжательном падеже:
1. A book of Mr Sage
2. A letter of my chief
3. The hand of Mrs Leondes
4. The room of managers
5. Names of salesman
6. The advice of Miss Jane
7. Businessmen of Ukraine
8. The proposal of our Director
9. A receipt of a consignee
10. A bill of lading of a ship
11. A call from John Smithers
12. The commission of Mr Bell

1/ A Mr Stage`s book2/ My chif`s letter3/ The Mrs Leondes`s hand4/ The managers`s room5/ Salesman`s names6/ The Miss Jane`s advice7/ Ukraine`s businessmen8/ The our director`s proposal9/ A consignee`s receipt10/ A ship`s bill of landing11/ A John Smithers`s call12/ The Mr Bell`s commission.