单项选择题

A．＄100.
B．＄150900.
C．＄185.
D．＄200.
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单项选择题
A．To a druggist.B．To a doctor.C．To a dentist.D．To his wife.
A．To a druggist.
B．To a doctor.
C．To a dentist.
D．To his wife.
单项选择题
A．Middle-aged and elderly people.B．Young working mothers.C．University students and teachers.D．Children and adolescents.
A．Middle-aged and elderly people.
B．Young working mothers.
C．University students and teachers.
D．Children and adolescents.
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