The turtle is green. It is big.
The turtle which is green is big.
The laptop is black. .It is new.
The laptop which/that is black is new.
The man is driving. He is my dad.
The man who/that is driving is my dad.
The pencil is yellow. It is mine.
The pencil which/that is yellow is mine.
The water is cold. It is fresh.
The water that/which is cold is fresh.
The girl is dancing. She is my friend.
The girl who/that is dancing is my friend.
The old man is writing. He is my grandfather.
The old man who/that is writing is my grandfather.
The rat is gray. It is small.
The rat which is gray is small.
The apple is red. It is delicious.
The apple that/which is red is delicious.
The cat is orange. It is fat.
The cat which is orange is fat.