Earth Day
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练习内容
Earth Day\nThe first Earth Day was on April 22, 1970. It was in the United States.\nA man named Mr. Nelson started it. He wanted people to take care of the earth. People worked on cleaning the land, w
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Earth Day\nThe first Earth Day was on April 22, 1970. It was in the United States.\nA man named Mr. Nelson started it. He wanted people to take care of the earth. People worked on cleaning the land, w