Заполним пропуски, основываясь на примерах и общепринятых значениях.
Ответ: 1. books - three books; 2. notebooks - one notebook; 3. pens - five pens; 4. pencils - ten pencils; 5. pencil cases - two pencil cases; 6. pencil sharpeners - three pencil sharpeners; 7. rubbers - four rubbers; 8. rulers - two rulers; 9. computers / laptops / tablets - one computer; 10. mugs - three mugs.