单项选择题

In the writer's view ______.

A．people should be prepared for the future
B．there exists no threat of unemployment
C．unions can stop the unfavorable change
D．people had better become cleaners

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单项选择题It is expected that by 2010 new technology will have revolutionized communications and ______.

A．the motor car will have taken the place of the postman
B．the current postal system will not exist
C．people won't send letters any more
D．bookstores will disappear

单项选择题We can learn from the second paragraph that ______.

A．traditional professions won't be affected by new technology
B．doctors won't be as efficient as computers
C．computers can not replace lawyers
D．experts will know less in the future