A. higher than it was in the morning B. a little less than it was in the morning C. level with what it had been in the morning D. deeper than it had been when he studied it 参考答案:B 答案解析:此题为细节题。从文章第二句和第三句得知it had fallen very slightly 中的it 指level of water,因为文章说the boat was not taking in