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Unit 7 Whats the highest mountain in the world?Language GoalTalk about geography and nature.Qomolangmathe Nilethe Caspian Seathe SaharaMatch the facts you know.Qomolangmaabout 9,600,000 square kilometers in sizethe Sahara1,025 meters deepthe Caspian Sea6,671 kilometers longthe Nile8,844.43 meters high比比较级与最高与最高级1.Qomolangma is _ than any other mountain in the world.2.The Sahara is _ desert in the world.3.The Caspian Sea is _ of all the salt lakes.4.The Nile is _ river in the world.higherthe biggestthe deepestthe longestMake conversations.Make conversations.