单选题 The {{U}}steadily{{/U}} rising cost of labor has greatly increased the cost of shipping cargo by water.
  • A. suddenly
  • B. gradually
  • C. excessively
  • D. exceptionally
【正确答案】 B
【答案解析】[解析] 本题考查副词。划线单词steadily的意思是“稳定地”，与gradually意思相近，故本题选B。