Впишите -S там, где это необходимо.

1. ten frogs, six frogs, one frog, three frogs 2. one apple, eight apples, six apples, four apples 3. two trees, three trees, nine trees, one tree 4. five rulers, one ruler, seven rulers, two rulers 5. one chair, four chairs, two chairs, three chairs 6. eight books, nine books, one book, three books 7. four rubbers, three rubbers, two rubbers, one rubber 8. ten pencils, one pencil, six pencils, seven pencils