I wonder when they ___ for Beijing. I will go to the train station to see them off whenthey ______.

When you got there, how many guests    in the meeting hall?

Many teachers______cars nowadays. They drive to work every day. 

—My sister looks very upset. What should I do?—I think she      happy if you ____a surprise party for her .

—Excuse me, Mum. When can we have dinner?—Not until it                in half an hour.