问题
选择题
Aunt Mary is crazy about shopping. She must be snapping up the bargains in the department store during such a sale, ?
A．mustn’t she?
B．isn’t she
C．needn’t she
D．doesn’t she
答案
答案：B
当must用来表示对现在的情况进行推测时，问句通常要根据must后面的动词采用相应的形式。Must后的动词时be，主语she是单数第三人称，故选B。
