Giúp mình với ạ, cảm ơn

1. rang/ was taking

2. saw/ standing

3. had already seen

4. I have ever seen

5. had gone/ went

6. told/ had visited

7. went/ had called

8. were you doing

9. mentioned/ have never heard

10. came/ were playing

11. had done/ met

12. hear/ get/ leave

13. hadn't seen/ met

14. lived/ cheated/ made

15. were selling/ got

16. thought/ left/ was/ arrived/ learned/ has just left/ found/ used

17. ate/ had never eaten

18. was crossing/ turned/ hit