When I ----(arrive) at the station,the train ----(start) alr

When I __arrived__(arrive) at the station,the train __had started__(start) already.
Peety ___has just watered__(just water) the flowers when it ___began___(begin) to rain.
After he _had finished_____(finish) work,he___went___(go) home.
As soon as the sun __set____(set),we __returned_____(return) to the factory.
The streets ___was____(be) wet yesterday morning because it __had rained_____(rain) the night before.
She ____felt__(feel) much better yesterday after _having_taken_____(take) the medicine.