单项选择题

A．Buses.
B．Bicycles.
C．Showers.
D．Schools.
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单项选择题
A．An airport.B．A bus station.C．A super highway.D．A train station.
A．An airport.
B．A bus station.
C．A super highway.
D．A train station.
填空题
Why are distances becoming less
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