单项选择题

What does VOIP refer to

A．An Internet forum.
B．A technology of telephone service.
C．Communication via e-mail.
D．An Internet conferenc
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单项选择题
Which of the following is NOT mentioned as a cause for the slow growth of job opportunities
A．Mergers and challenges in the airline industry.
B．Advancement in technology.
C．Advanced business communication means.
D．Terrorists' attacks.
单项选择题
What is expected to rise in the U.S. from 2003 to 2010
A．The cost of living.
B．The travelling expense.
C．The employment of pilots.
D．The retirement ag
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