III. Join the sentences. Use the possessive case of nouns.
Ex. Helen has a cat. It is white.
→ Helen's cat is white.
25. John has a sister. She is naughty.
26. My grandmother has a house. It is near the sea.
27. Mr. White has a wife. She is at home now.
28. The boys have an aunt. She is very kind.
29. Mary and Paul have a son. He is five years old.
30. Dr. Johnson has an office. It is dark.
33. The students have a task. It's difficult.