单项选择题

In Para. 4, Line 2, "telephone tag" is ______.

A．an ability to communicate with people with ease
B．getting the wrong person on the telephone
C．an inablity to find time to telephone the person
D．an inability to contact the person you phone

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热门试题

单项选择题

According to the passage, electronic mail is a way to ______.

A．replace the old mail system
B．get electronics by mail
C．connect the users to the post office
D．communicate by personal computers or computer terminals

单项选择题

Why was electronic mail unsuccessful in the past

A．Because its users subscribed to different, unconnected mail services.
B．Because people thought its services expensive.
C．Because people couldn't afford the personal computer.
D．Because computer networks used to disconnect globally.