单项选择题

A．He should sit in the smoking section.
B．He should ask the stewardess for help.
C．He should move to another part of the plane.
D．He should put out his cigarette at once.
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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
单项选择题
I
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