Japan received huge sums of capital from the United States after the Second World War, using it to help build a modern industrial system. (A) Japan received huge sums of capital from the United States after the Second World War, using it to help build (B) Japan received huge sums of capital from the United States after the Second World War and used it to help in building (C) Japan used the huge sums of capital it received from the United States after the Second World War to help build (D) Japan’s huge sums of capital received from the United States after the Second World War were used to help it in building (E) Receiving huge sums of capital from the United States after the Second World War, Japan used it to help build 答案是C,难道这里的it做的是同位语?也没见过这么用的阿 实在有些看不懂,请大虾们指点