The prices of the apartments downtown were _____ high so we ______ gave up the idea of buying one there and chose to live in the suburb.
---Fish need water to survive; _____ , we human beings rely on air to live.
____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.