valley - an area of low land between hills or mountains, often with a river running through it, river - a natural wide flow of fresh water across the land into the sea, a lake, or another river, mountain - a raised part of the earth's surface, much larger than a hill, the top of which might be covered in snow, volcano - a mountain with a large hole at the top of which gases, steam, and dust are forced out:, cave - a large hole in the side of a hill, cliff, or mountain, or one that is underground, lake - a large area of water surrounded by land and not connected to the sea , waterfall - water, dropping from a great height, rainforest - a forest in a tropical area that gets a lot of rain, ocean - a very large area of sea, beach - an area of sand or small stones near the sea or river, cliff - a high area of rock with a very steep side, often on a coast:, dune - a hill of sand near a beach or in a desert, desert - an area, often covered with sand or rocks, where there is very little rain and not many plants:, wave - a line of water that moves across the surface of an area of water, especially the sea:, rock - the dry large piece sticks up out of the ground or the sea,

english plus 3 unit 3

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