（１）This is my dog.
（２）That is my car.
（３）These are beautiful pictures.
（４）Those are my classmates.
（５）I always introduce my family.
（６）This is my wife, Mary, and this is my son, Jordan.
（７）Hello, this is Bill.
（８）This dog is very cute.
（９）That house is very nice.
（10）This is my cat.
（11）Is this your pen? Yes, it is.
（12）That is my brother.
（13）This book is very interesting.
（14）Those are good books.
（15）That picture is very beautiful.
（16）That is a very beautiful picture.
（17）Rachel, this is Ryan.
（18）Are these books interesting? Yes, they are.