单项选择题

A．he established the United States postal system
B．he served as the postmaster general
C．he increased the number of post offices
D．he was made postmaster by the U. S.
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单项选择题
A．At about 1880.B．In 1887.C．In the 20th century.D．No one knows it.
A．At about 1880.
B．In 1887.
C．In the 20th century.
D．No one knows it.
单项选择题
A．Benjamin FranklinB．the United StatesC．the history of the U. S. mailD．star routes
A．Benjamin Franklin
B．the United States
C．the history of the U. S. mail
D．star routes
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