Yangzi River is the first _______ river in China. A. bigger B. big C. biggest
He has never been to America ___________?
Usually people in Japan and Korea _______ when they meet for the first time.
After having a class, there _____ some students _____ games happily.
—Could you tell me ______? —Sure, just five minutes ago.
We can’t visit the China space Museum because the price of the ticket is too ______.