Ex1 (кое где пишу только то, что нужно изменить, остальное так же): 1- copies ("A" убрать в начале предложения), was изменить на were, 2- leaves, trees, 3- women, are our secretaries, 4- these shoes are too large for my feet. 5- are these workers Englishmen or Germans. They are Frenchmen. 6- mice were. 7- what are the children's names? 8. Roofs, houses were. 9. Potatoes are vegetables and cherries are fruits. Ex 2: 1. This factory produces furniture. 2. Wife, sailor. 3. Foot and a hand. 4. An ox, a sheep, a cow and a goose. 5. Does your tooth. 6. This is my friend's study. 7. Toy, a box. 8. This lady is that gentleman's wife. 9. The child is sitting on the bench. Ex 4. 1. What are those children's names? 2. The cats have caught mice. 3. There were ladies, gentlemen, boys and girls in the room (rooms). 4. Так же как и 4 предложение написано во втором упражнение, только что farmyard можешь сменить на farmyards или оставить так же, я не уверена все ли существительные нужно менять на мн число, в задание не написано. 5. Так же, как и измененное (не оригинальное как в задание) 5 предложение в первом задание. 6. Why don't you eat these potatoes? 7. These strawberries are still green. 8. Изменить только leaves have, остальное так же. 9. Can you see birds in those trees? 10. Do your teeth still ache? 11. "Foot" на "feet" изменить, а "it" на "them". 12. His children study very well. 13. These men work at our office(или offices, по той же причине что и выше писала). 14. There are new houses in our street. 15. These stories are very interesting. 16. "Foot" на "feet" изменить только. 17. The wolves have been shot. 18. Toys, boxes (без "а"). 19. Put these knives on that table (или those tables).