Among all the means of transportation, trains are __________, cheap and the best for long-distance journeys.
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.