| Name the two longest rivers in the world. |
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| Name the two longest rivers in the United States. |
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| Name the two most populous countries in the European Union. |
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| Name the two most populous cities in the European Union. |
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| Name the two oceans with the deepest average depth. |
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| Name the two largest countries in area. |
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| Name the two largest U.S. states in area. |
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| Name the two smallest U.S. states in area. |
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| Name the two most populous cities in Italy. |
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| Name the two most populous cities in Illinois. |
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| Name the two most populous continents. |
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| Name the two highest mountains in the world. |
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| Name the two most populous cities in India. |
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| Name the two most visited U.S. National Parks. |
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| Name the two largest Great Lakes. |
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| Name the two most populous cities in Japan. |
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| Name the two northernmost world capitals. |
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| Name the two largest deserts (excluding polar deserts). |
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| Name the two largest African countries in area. |
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| Name the top two countries in per-capita beer consumption. |
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| Name the two countries with the highest population density. |
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| Name the two largest island countries (based on area). |
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| Name the two largest islands in the U.S. (based on area). |
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| Name the two most populous cities in Egypt. |
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