It looks like you have a fill-in-the-blank exercise. Here are some suggestions to complete the sentences:

25. "We bought that house last year. It is **ours**."
26. "His car belongs to Mr. and Mrs. Smith. It is **theirs**."
27. "I think I saw John drop this pen. I think it is **his**."
28. "This book is **mine**."
29. "My brother and I made that chair. It’s **ours**."
30. "Excuse me. This phone is **yours**. You forgot to take it with you."
31. "Her sister drew the picture. It’s **hers**."
32. "The little boy shouted, 'Give the ball to me! It’s **mine**!'"
33. "We bought it last night at the department store. It’s **ours**."
34. "The bicycles were **theirs**, so they rode them home after school."

Feel free to adjust any responses based on your specific context!