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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．Because it doesn’t go directly to the park.B．Because it goes directly to the park.C．Because it’s much slower than a bus.D．Because it’s much less complicated that way and much quicker.
A．Because it doesn’t go directly to the park.
B．Because it goes directly to the park.
C．Because it’s much slower than a bus.
D．Because it’s much less complicated that way and much quicker.
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