Canada and the United States are two countries. They are on the same continent (大陆) next to each other and share (共有) the same language. These two countries also share in other wags.Canada buys many things from the U.S.Cars and clothes are two examples. The Unite States also buysCanadian made things. Much of the paper used in the United States comes fromCanadA、Some of the oil we use comes fromCanada, too. Americans travel toCanada on holidays.AndCanadians often visit the United States.Canadians read about the U.S. in newspapers and books.Americans watchCanadian sports played in the United States. There are important differences between the two countries. They are about the same size.But the U.S. has many more people.Because the number of people is smaller, there is more open space inCanadA、There is more unused lanD、This is another important difference. The writer writes the text mainly to ______.A．introduce the two countries B．show the difference of the two countries C．tell a story of two very friendly countries
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