Many people used to ________ that our planet was the center of the universe
thought
think
understand
I can't go home. I wish I ______ go home.
could
We ________ an experiment when a fire ________.
did/ was starting
did/ started
were doing/ started
When the scientist ________ the answer to the problem, she ________ very famous
was finding/ became
was finding/ was becoming
found/ became
If I ______ more time tonight, I ______ and see my friends tonight.
had/ would go
would have/ went
The electricity ________ while I ________ my homework
went off/ was doing
went off/ did
was going off/ did
The bus isn't here. I wish the bus ______ here.
was