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________? 3. 我們可以坐在樹陰下乘涼。 We can sit _______a tree_________. 4. 植物覆蓋著土壤,那么水和風(fēng)就不會把土壤帶走。 Plants _______ the soil. Then wind and water ______the soil ______. 5. 所有的植物都從太陽光中吸收能量并制成養(yǎng)料。 All plants _______energy _____the sun and ____ _it _____food. IV. 閱讀理解。 Mr. Smith lives in a village(村莊) , but he works in a big city. He goes to work by train every morning and es home in the same way. This morning, when he is reading his newspaper (報紙) on the train, a man behind him says “hello” to him and begins to talk to him, “Your life is not interesting, is it? You take the same train every morning, an d you always