He insisted that he _________ nothing wrong and ________free .
As his son played a range of classical pieces from Mozart to Beethoven smoothly, the father swelled pride.
I go to bed when I heard someone knocking at the door.
If you want to talk with the manager, you have to wait for twenty minutes.
Recent scientific evidence seems to indicate that this is incorrect.
Maybe if I science, and not literature then, I would be able to give you more help.