单项选择题

A．Because man has a strong desire for a modern way of life.
B．Because people pay no attention to it.
C．Because people from the countryside rush into the cities.
D．Because people are not aware of the benefits of modern society.
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单项选择题
A．The workers on the underground platforms were replaced by machines.B．It became the first completely automatic railway in the world.C．A completely automatic line was added to its network.D．Computers began controlling the trains on the line.
A．The workers on the underground platforms were replaced by machines.
B．It became the first completely automatic railway in the world.
C．A completely automatic line was added to its network.
D．Computers began controlling the trains on the line.
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