单项选择题

A．Living conditions.
B．Sunshine and fresh air.
C．Air-conditioned houses.
D．A few flowers and a few leaves.
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单项选择题
The first national flags of the United States______.
A．represented the 13 colonies which won independence in 1776
B．were flown in American colonies in 1776
C．were flown in American colonies in 1795
D．gave representation to Congress
填空题
literature
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