Трансформуйте подані речення у форму множини

1These are my feet 2Those ladies don't play the piano. 3These children are watching the leaves falling on the grass. 4Are these mountains high?Yes,they are. 5There are knives on the kitchen-tables. 6These birds are in those trees. 7Those wolves have eaten sheep. 8There were deserts here. 9Are there calendars in these rooms? 10Those sandwiches aren't on those plates. 11Where are the children?The children are in the yards. 12Are these geese big or small? They are big. 13Were there leaves on the ground? 14Those boys were playing football? 15Where are the book?The books are on the shelves.