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 advance.

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单项选择题

From the passage we can see________.

A．early land policy was favorable for the expansion of the new nation
B．rich families moved west and bought land
C．there were no financial problems in building railroads in the middle of the 19th century
D．colleges in the original thirteen states could own land

单项选择题

Many people moved west after independence in order to________.

A．buy land at a low price
B．occupy land for family farms
C．build railroads
D．set up colleges