单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．An airport.
B．A bus station.
C．A super highway.
D．A train station.
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Why are distances becoming less
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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