expert please answer all of them.

Dear Student,

1. had woken
2. left
3. missed
4. went back to sleep
5. arrived
6. had begun
7. had bought
8. reached
9. had been dimmed
10. had been welcomed
11. begun
12. had occupied
13. had given
14. had been waiting
15. left
16. caused
17. missed
18. were

Regards