1. These shoes are black.

2. these shoes are gray.

3. this pen is small.

4. this pen is very large.

5. the time on that clock is 5:00.

6. the time on that clock is 11:50.

7. this plane is a toy.

8. this plane isn't a toy.

9. this cat is eating.

10. this cat isn't eating.

11. these glasses are for reading.

12. these glasses are sunglasses.