----Hey, you haven’t been acting like yourself. Everything OK?----________ .
Many people _____ the opening ceremony of 2010 World Expo, which was so amazing.
This is the very book _____ I need now.
Not the way he did it but his words _____ criticized by people present.
With a lot of difficult problems_____, the newly-elected manager is in a dilemma.
I still remember_____ to visit the Mountain Tai when I was young and I am longing to visit it again.