成人英语三级考试

【单选题】You must have seen the film last night, ______
A. didn't you
B. mustn't you
C. needn't you
D. do you

网考网参考答案：A
网考网解析：
当陈述句部分的must表示“一定”、“想必”等推测意义时，疑问尾句不用mustn't，而是根据陈述句部分的谓语动词来确定。如：He must have waited here for a long time，hasn't he 中的陈述句相当于I'm sure he has waited...，所以反意疑问部分用hasn't he。本题正确答案为A。 查看试题解析出处>>