61. C考查细节理解。从第二段的"The main theme is a teenage search of self-discovery, in this case the search for a mother from whom the hero was separated at an early age."可知，这部小说主要讲的是一个少年的自我发现的旅程。

62. D考查推理判断。从第二段的"You are diving like a young man who knows where he is going."可知，詹姆斯已经长大了，自己可以决定前进的道路。

63. B 考查细节理解。从第四段的"The only clue he has is a fossil, 'the snake stone' which she left behind along with a note on which she had written"可知，这块化石是詹姆斯生母留下的唯一一条线索。

64. C 考查细节理解。从第三段的"The other characters in The Snake-Stone, James' parents, his diving instructor, best friend, the villagers, people he meets on his journey, are pictured realistically."可知，小说中的人物描写得非常逼真，非常生动。

65. A 考查推理判断。从最后一段的"Although the meeting is not long, it leaves him with a feeling of completeness."可知，詹姆斯的这次旅行非常值得。