--- How do you deal with the disagreement between the company and the customers? --- The key __ the problem is to meet the demand__ by the customers.
He asked __________ for the violin.
To get a better grade, you should __________ the notes again before the test.
The World Expo is like __________ great stage for cultural exchange, bringing people into closer contact with __________ rest of the world.
__________ without friends __________ the most difficult challenge for Chuck while living on the island.
The new plane will __________ a series of test flights before it is put into use.