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.
单项选择题
A．It helps to keep the eyes moist.B．It helps the eyes absorb eye-drops.C．It improves a person’s concentration.D．It prevents a buildup of chemicals in the eyes.
A．It helps to keep the eyes moist.
B．It helps the eyes absorb eye-drops.
C．It improves a person’s concentration.
D．It prevents a buildup of chemicals in the eyes.
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