He used to be a heavy smoker, _______?

He used to be a heavy smoker, _______?
A、used he
B、didn’t he
C、doesn’t he
D、wouldn’t he
【正确答案】:B
【题目解析】:本题考查反意疑问句。used是use的过去式,反意疑问句的后半部分可用usedn't he 或didn't he.