【题目】— I spent two weeks in London last summer.
— Then you must have visited the British Museum during your stay, _______ you?
A.mustn't
B.haven't
C.didn't
D.hadn't

【答案】C
【解析】题意：逗留伦敦期间肯定去看过大英博物馆。题中last summer表示的是一个确定的过去时间，可认定must have visited是对“过去”的推断。故C项正确。