Who is Uncle Sam? He has a long white beard. He wears a tall hat and a red, white, and blue suit. He is Uncle Sam, and he is a symbol of the U.S. government. Is Uncle Sam a made-up cartoon character? Or is he based on a real person?One idea is that Uncle Sam was named after a man named Samuel Wilson. He was born in Arlington, Massachusetts, September 13, 1776. At the age of 14 Sam joined the American Revolutionary War, and served in the army under George Washington until the end of the war. He then moved to Troy, New York, and began a meatpacking business. On October 2 that year, a group of visitors came to Sam’s meatpacking plant. The meat was packed in barrels stamped with the lettersU.S. Actually it was the short form for the United States. Some people joked thatU.S. stood for “Uncle Sam” Wilson.In 1838 Thomas Nast created a picture of Uncle Sam. Nast drew political cartoons. In these cartoons, Uncle Sam has a beard. Samuel Wilson, who didn’t have a beard, was probably not Nast’s model.By 1916 the United States was at war again. The comics artist James Flagg painted a poster to get people to join the Army. On it, a determined-looking Uncle Sam points and says, “I WANT YOU.”To this day, Uncle Sam is a symbol for American strength and determination. “Uncle Sam” had come to symbolize the character of the nation and the government. In 1961, the U.S. Congress made a decision that “Uncle Sam” is the America’s national symbol.1.What did Sam do in Troy, New York?A) He began a meatpacking business.B) He served in the army.C) He delivered letters in a town.D) He painted posters for the war.2.Why did the comics artist James Flagg create the Uncle Sam poster?A) To call for people to fight for their dreams.B) To unite people outside the U.S.C) To get people to join the army.D) To show people a political cartoon.3.Why is “Uncle Sam” a national symbol of the U.S.?A) Because it was created at a time when the country was founded.B) Because it is one of the favorite images of the American people.C) Because it stands for American strength and determination.D) Because it was the first political cartoon character in the U.S.4.What is the passage mainly talking about?A) The birth of the first cartoon in the United States.B) The life of a famous person in the American history.C) The origin of a famous American symbol.D) The introduction of an American meat brand.