单项选择题

Which of the following was seen as a disadvantage of the postage stamp

A．It was very easy to counterfeit.
B．It increased the cost of mail delivery.
C．It was difficult to affix to letters.
D．It had to be purchased by the sender in advanc

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单项选择题

What does the passage mainly discuss

A．The increase of private mail service.
B．A comparison of urban and rural postal services.
C．The development of government postal system.
D．The history of postage stamps.

单项选择题

In 1863 the United States government began providing which of the following to mail carriers

A．Housing.
B．A salary.
C．Transportation.
D．Free postage stamps.