核心问题
Meeting my uncle after all these years was an unforgettable moment, ____ I will always treasure.
A. that B. one C. it D. what(全国高考,02-35)
答案为 B。但是, one 在这里起什么作用呢?
词典解答
从句法上说,one 在这里是个替代词(代替 a moment),其后省略了充当动词 treasure 宾语的关系代词 that,也就是说,I will always treasure 是 one 的定语从句。从与上个分句的关系来看,one 是 an unforgettable moment 的同位语。类例：
The emotion he felt was one he had not felt for some time. (Dan Brown, The Da Vinci Code) 他有一种许久不曾有过的感觉。(《达·芬奇密码》)