Listen! Helen is singing in the classroom.—It _______ be Helen. She has gone to Shanghai.

er how it ____ that Chinese climberssuccessfully finished the torch relay on the Mount Qomolangma, where the air isso thin.

Sally’s on the other phone-would you like to ______.— OK, no problem. [ ]

Mr. Liu ____ come to the party, but perhaps he will go to see his father. [ ]

The bus      for about half an hour. Let`s come tomorrow earlier.