单项选择题


Questions 22 to 25 are based on the conversation you have just heard.

A．It costs too much.
B．It needs repairing.
C．It should be modernized.
D．It still can be used.
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单项选择题
A．It is the first completely automatic railway in the world.B．The workers on the underground platforms are replaced by machines.C．Its trains are computer-controlled.D．Its trains run at a high speed.
A．It is the first completely automatic railway in the world.
B．The workers on the underground platforms are replaced by machines.
C．Its trains are computer-controlled.
D．Its trains run at a high speed.
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