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

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单项选择题

Which of the following is NOT true according to the passage

A．Before 1959 the flag had been changed 25 times.
B．Each federal department has its own official flag.
C．The national flag of the U. S. had 26 stars on it after admission of Hawaii into the Union in 1959.
D．In 1912, there had been 48 states in the Union.

单项选择题

The word subjects in paragraph 4 means ______.

A．something to be considered
B．branch of knowledge studied
C．persons chosen to be studied in an experiment
D．any member of a state except the supreme ruler