单项选择题

Which of the following is the best possible title for this essay

A．An Introduction to Desktop Video Conferencing.
B．Modern Office and Video Conferencing.
C．A New Solution for Office Work.
D．Face to Face with Your Partners.

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单项选择题

How many terms can a president in the United States be elected to at most

A．1.
B．2.
C．3.
D．4.

单项选择题

Front the passage, we can safely infer that ______.

A．the use of video conferencing is still a mystery for the general public
B．video conferencing may be as simple as telephones for communication
C．face to face relationship is important for customers and suppliers
D．video conferencing is especially popular with information technology firms