. Before radio and TV, music could only be heard _______, that is, you had to go to places where musicians gave performances.
A poet and artist ______ coming to speak to us about Chinese literature and painting tomorrow afternoon.
The president spoke at the business meeting for nearly an hour without ______ his notes.
Only when your identity has been checked ______.
How did you get ________news that they would take ________trip to Disneyland?
It is required by law that a driving test _______ taken before a man gets a license.