1. This boy, these boys.
2. That house, those houses.
3. This sweet, these sweets.
4. That book, those books.
5. That tree those trees.
6. This desk, these desks.
7. This apple, these apples.
8. That plane, those planes.
9. That t-shirt, these t-shirts.
10. This car, these cars.
11. That star, those stars.
12. This umbrella, those umbrellas.