单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard.

A．By looking at the sky.
B．By changing the weather.
C．By making forecasting.
D．By controlling the weather.
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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.
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