For me traveling to Antarctica proved to be the beginning of a new life I had thought I

问题补充：

For me traveling to Antarctica proved to be the beginning of a new life, I had thought I would never see.

A. what

B. that

C. one

D. it

答案：

A. what

B. that

(答案→)C. one

D. it

解析：考查不定代词的用法。句意：对我来说到南极洲旅行是新生活的开始，一个我本以为不会看见的新生活。句中I had thought 是插入成分，one 代替a new life。也可以用关系代词which，指代a new life。