When I ____(arrive) at the station,the train ____(start) already.还有：Peety _____(just water) the flowers when it ______(begin) to rain.After he ______(finish) work,he______(go) home.As soon as the sun ______(set),we _______(return) to the factory.The streets _______(be) wet yesterday morning because it _______(rain) the night before.She ______(feel) much better yesterday after _______(take) the medicine.

had just watered,began
had finished,went
set,returned
was,had rained
felt,taking

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.