—Where is Sally?—I’m not sure. She      in the library.

 —Must we finish the project in a month?—No, you _______. 

John, look at the time. ____ you play the piano at such a late hour?

It has been announced that all the candidates______ remain in their seats until all the papers have been collected.

If you want to book tickets for the 2012 Olympic Games, just call 00952012．It ______ be simpler．