It was China that first coal(煤) and used it in the world.

A. found B. found out C. discovered D. invented

C 【解析】句意：這是中國(guó)首次在世界上發(fā)現(xiàn)煤和使用它。考查動(dòng)詞辨析題。A. found尋找，強(qiáng)調(diào)過(guò)程；B. found out找出，強(qiáng)調(diào)結(jié)果；C. discovered發(fā)現(xiàn)（本就存在的事物）；D. invented發(fā)明（不曾有的事物）。first第一次；根據(jù)句意和語(yǔ)境，可知選C。
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