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.