Исправить предложения, где необходимо

3. refused to speak

4. ✔️

5. ended up eating

6. ✔️

7. had already finished

8. ✔️

9. plan to visit

10. ✔️

11. mine did

12. has been riding

13. are you studying

14. I really like

15. ✔️

16. studying