I wondered .
A. what the matter was
B. what was the matter
C. the matter was what
D. was the matter what
网友回答
A. what the matter was
(答案→)B. what was the matter
C. the matter was what
D. was the matter what
解析：wondered 后接what引导的宾语从句,所以语序用陈述句的语序,同时此处的 what作主语.