单项选择题

A．It will be very far.
B．It will be taken as planned.
C．It was canceled on Saturday.
D．The arrangements are uncertain so far.
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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．Its trains became computer-controlled.
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．Its trains became computer-controlled.
单项选择题
A．People in developing countries. B．People in Asian countries. C．People in European countries. D．People in developed countries.
A．People in developing countries.
B．People in Asian countries.
C．People in European countries.
D．People in developed countries.
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