---Will you come over to Beijing for the may Day holiday? ---I’d like to, but my family__________the 2010 World Expo in Shanghai during the holiday.
---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.