XII. Read the reading below carefully, then complete the blanks with the words given (Hãy đọc bài đọc sau cẩn thận, sau đó điền vào chỗ trống những từ cho sẵn): (make, mixing, and, melted, steel, produced, normally, method, materials, percent.) There are two methods of making (1) …………………..using recycled material: the basic oxygen furnace (BOF) (2) …………………….and the electric arc furnace (EAF) method. The BOF method involves (3) …………………………molten scrap steel in a furnace with new steel. About 28 (4) ………………………..of the new product is recycled steel. Steel mabe by th BOF method typically is used to (5) ……………………..sheet-steel products like cans, automobiles, and appliances. The EA method (6) …………………..uses 100 percent recycled steel. Scrap steel is placed in a furnace and (7) …………………by electricity that arcs between two carbon electrodes. Limestone and other (8) ………………….are added to the molten steel to remove impurities, steel (9) ………………………….by the EAF method usually is formed into beams reinforcing bars, (10) …………………………..thick plate…