单项选择题

A．Middle-aged and elderly people.
B．Young working mothers.
C．University students and teachers.
D．Children and adolescents.
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单项选择题
A．＄100.B．＄150900.C．＄185.D．＄200.
A．＄100.
B．＄150900.
C．＄185.
D．＄200.
单项选择题
A．At a hotel.B．At a theatre.C．At a cinema.D．At an airport.
A．At a hotel.
B．At a theatre.
C．At a cinema.
D．At an airport.
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