单项选择题

A．In the morning.
B．In the early afternoon.
C．In the evening.
D．At midnight.
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单项选择题
A．By looking at the sky.B．By changing the weather.C．By making forecasting.D．By controlling the weather.
A．By looking at the sky.
B．By changing the weather.
C．By making forecasting.
D．By controlling the weather.
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.
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