单选题 1.  The steadily rising cost of labor on the waterfront has greatly increased the cost of shipping cargo by water.
【正确答案】 A
【答案解析】 本句句意：滨海区劳动力价格的持续上涨已经大大增加了货物运输成本。画线词steadily：稳固地，持续地，与选项中的gradually意义一致，所以本题选A。