We have every reason to believe that ______ 2010 World Expo in Shanghai will be ______success.
We are having a class get-together. It’s been twenty years we graduated from high school.
—I have finished the homework. — . How about going out for a walk?
—You seemed not to be interested in the story yesterday. —Yes. I it in a magazine before.
We should go to school by bus or underground rather than by car global warming.
—Now, where is my key? —! They are waiting for us at the school gate.