单项选择题

Internet provides ______.

A．consumers with international business opportunities
B．subscribers with a cheap and efficient link
C．formal roles to oversee its users
D．telecommunications services to users

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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

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