单项选择题

A．Business executives.
B．White-collar workers.
C．Fashionable young people.
D．Government officials.
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单项选择题
A．A teacher.B．A babysitter.C．An editor.D．A doctor.
A．A teacher.
B．A babysitter.
C．An editor.
D．A doctor.
填空题
maintains
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