I think he is a student ？A. don’t IB. isn’t heC. is heD. do I

问题补充：

I think he is a student, ？

A. don’t I

B. isn’t he

C. is he

D. do I

答案：

A. don’t I

(答案→)B. isn’t he

C. is he

D. do I

解析：句意：。我认为他是一个学生，对吗？反意疑问句的陈述部分为I(We) think(believe, suppose, consider) + that从句时，问句部分的动词及主语与that从句内的动词和主语保持一致。所以选B。