He used to be a teacher,( A.isn't he B.doesn't he C.didn't he D.wasn't he

He used to be a teacher,( A.isn't he B.doesn't he C.didn't he D.wasn't he
He used to be a teacher,( A.isn't he B.doesn't he C.didn't he D.wasn't he

He used to be a teacher,( A.isn't he B.doesn't he C.didn't he D.wasn't he
used to 的否定形式有两种
didn't use to 或者 usedn't to
这是一个反意疑问句,前面是陈述句,后面用否定句提问,所以C

选C 主干意思是他曾经是一位教师，是一般过去时态

C