-What ___ you ___ at 6 p.m. yesterday?
-I ___ my homework. After I ___ it I played chess with my friend.

had/done/had done/did
were/doing/was doing/had done
was/doing/was doing/had done
did/do/did/have done
were/doing/did/have done
Table of English Grammar Contents (All Levels)
English Vocabulary Tests
Elementary Grammar Exercises A1
Advanced Grammar Exercises