His parents wanted him to be a doctor they thought was a steady and well-paid job．A. who

问题补充：

His parents wanted him to be a doctor, they thought was a steady and well-paid job．

A. who

B. that

Cwhat

D. which

答案：

A. who

B. that

C. what

(答案→)D. which

解析：考查非限制性定语从句。先行词为a doctor，they thought做插入语，从句中缺少主语，所以使用关系代词which。