单项选择题

Which of the following is NOT available so far but yet to develop

A．Emerging standards.
B．Voice communication.
C．Video tele-conferencing.
D．High-speed ISDN and cable links.
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单项选择题
In the future, according to the writer, all of the following are expected EXCEPT______.
A．more accessible voice communication
B．cheaper cable links more commonly available
C．more global pen friends through emails
D．easier and better video tele-conferencing
单项选择题
The Internet is improving by leaps and bounds every day because it______.
A．is easier to learn than merely face-to-face
B．provides an excellent and powerful resource
C．is increasingly equal and affordable
D．is an increasing supply of millions of URLs
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