[单项选择]The basic flag of the United States is one of the world’s oldest national flags. Only the basic flags of Austria, Denmark, Great Britain, the Netherlands, Sweden, and Switzerland are older.
During the discovery and settlement of what is now the United States, the flags of various European nations were flown over the land, as symbols of possession. Later, in the Colonial and Revolutionary War periods, flags representing famous persons, places, and events were flown in the American Colonies.
The first official flag of the United States was created by Congress on June 14,1777. It consisted of 13 alternate red and white stripes and 13 white stars in a field of blue, representing the 13 colonies that had declared their independence in 1776. Congress adopted a new flag of 15 stars and 15 stripes in 1795, to give representation to the two new states admitted into the Union, Vermont and Kentucky.
By 1817, there were 20 states in the Union, and it became apparent that addin
A. President Taft preferred the number
B. thirteen was then a lucky symbol
C. too many stripes would destroy the shape of the flag
D. the Congress agreed that stripes couldn’t represent states of the Union

[单项选择] The basic flag of the United States is one of the world’’s oldest national flags. Only the basic flags of Austria, Denmark, Great Britain, the Netherlands, Sweden, and Switzerland are older. During the discovery and settlement of what is now the United States the flags of various European nations were flown over the land, as symbols of possession. Later, in the colonial and Revolutionary War periods, flags representing famous persons, places, and events were flown in the American Colonies. The first official flag of the United States was created by Congress on June 14, 1777. It consisted of 13 alternate red and white stripes and 13 white stars in a field of blue, representing the 13 colonies that had declared their independence in 1776. Congress adopted a new flag of 15 stars and 15 stripes in 1795, to give representation to the two new states admitted into the Union, Vermont and Kentucky. By 1817, there were 20 states in the Union, and it became apparent that adding one str
A. Because the flags were older than the national flag of the U. S.
B. Because the land was divided by these nations.
C. Because there was no universal flag over the land.
D. We don’’t know from the passage.

[简答题]The United States was also one of the very few countries that refused to sign the biodiversity treaty.

[填空题]In the United States influenza is one of the ten principle causes of death.

[单项选择]The United States is one of the few countries in the world that has an official day on which fathers are honored by their children. On the third Sunday in June, fathers all over the country are greeted or otherwise made to feel special.
However, the idea for creating a day for children to honor their fathers began in Spokane, Washington. A woman by the name of Sonora Smart Dodd thought of the idea for Father’s Day while listening to a Mother’s Day sermon in 1909. Having been raised by her father, Henry Jackson Smart, after her mother died, Sonora wanted her father to know how special he was to her. It was her father that made all the parental sacrifices and was, in the eyes of his daughter, a selfless and loving man. Sonora’s father was born in June, so she chose to hold the first Father’s Day celebration in Spokane, Washington on the 9th of June, 1910.
In 1924 President Calvin Coolidge declared the third Sunday in June as Father’s Day. Roses are Father’s Day flowers, red to
A. people will wear the same flowers to honor their fathers
B. only daughters wear red flowers to honor their fathers
C. children must go home to honor their fathers
D. fathers are often honored in different ways