单项选择题

A．He established a government service.
B．He developed a system called "star routes".
C．He built a lot of post offices.
D．He established the postal system.
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单项选择题
A．The man has quit his job.B．The man is going to school.C．The man is promoted.D．The man failed in his work.
A．The man has quit his job.
B．The man is going to school.
C．The man is promoted.
D．The man failed in his work.
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