Old McDonald gave up smoking for a while, but soon _____ to his old way.
____time goes by, Mother’s hair is turning gray and the wrinkles on her face deeper.
Nowadays, there is a ____ that receiving education is a waste of time.
______ he had worked hard all the time, he failed the exam again.
Every time they met, they ____ talk about former classmates they remembered.
---You seem to have been impressed by his words. ---No, not exactly. It was what he did _____ what he said struck me most.