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.

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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.

单项选择题

Which of the following statements is NOT true

A．Anyone who wanted to build railroads could get some land.
B．"Land grant colleges" had land.
C．People moved to the new areas which had became states.
D．There were a lot of family farms after 1862.