_____ is known to us all is that the 2010 World Expo will take place in Shanghai.
The old man walks_____ dog after _____ supper every day.
My suggestion is that he _________to see a doctor at once.
Helen had to shout ________above the sound of the music.
I don’t know ______ tomorrow. Can you tell me?
A large number of students in our school ____ from the countryside; the number _____ growing these years.