ГДЗ граматика Англійська мова 7 клас Мітчелл

Choose a, b or c. 

1–b; 2–c; 3–c; 4–a.
1. Ask Tina about that T-shirt. I think it's b. hers. 2. These are Bill's knee pads. They aren't c. mine. 3. That's not the Brown's car. c. Theirs is in front of their house. 4. Can we book a. our tickets for the play online?