I think he must have seen me at the meeting last night ?A. didn’t heB. don’t I C. do ID.

问题补充：

I think he must have seen me at the meeting last night, ?

A. didn’t he

B. don’t I

C. do I

D. mustn’t he

答案：

(答案→)A. didn’t he

B. don’t I

C. do I

D. mustn’t he

解析：考查反义疑问句。主句谓语是think, believe, expect, suppose, imagine等引导的定语从句，疑问部分与宾语从句相对应构成反意疑问句。陈述部分有must 的疑问句，疑问部分根据实际情况而定。结合语境可知从句描述的过去的动作，为肯定语气，故选A。