ingles         

1. This book is mine. 
2. This exercise is easy. 
3. This room is too large. 
4. This is my Math book. 
5. This is your wallet. 
6. This chair is very comfortable. 
7. This car is dirty.
8. This motorbike is expensive. 
9. This is an old house.

1. These books are mine. 
2. These exercises are easy. 
3. These rooms are too large. 

1. Those books are mine. 
2. Those exercises are easy. 
3. Those rooms are too large.