This/That, These/Those

These exercises are easy.

1.-This exercise is easy.

These messages are for you.

10.-This message is for you.

Those letters on the table are for Mr. Smith.

11.-That letter on the table is for Mr. Smith.

These are my pens, not Henry's.

12.-This is my pen, not Henry's.

Those mountains in the distance form part of the Rocky Mountains.

13.-That mountain in the distance forms part of the Rocky Mountains.

These cars belong to my father.

14.-This car belongs to my father.

Those offices at the end of the hall are the administration offices.

15.-That office at the end of the hall is the administration office.

These chairs are very comfortable.

16.-This chair is very comfortable.

These rooms are too small for our class.

2.-This room is too small for our class.

Those pens on the floor are John's.

3.-That pen on the floor is John's .

These packs of cigarettes belong to William.

4.-This pack of cigarettes belongs to William.

Those boys on the other side of the street are George's brothers.

5.-That boy on the other side of the street is George's brother.

Those books are out of date.

6.-That book is out of date.

Those purses on the table are Mary's.

7.-That purse on the table is Mary's.

These are my English books.

8.-This is my English book.

Those are Henry's pens.

9.-That is Henry's pen.