–Whose notebook is this? Is it Julie’s? –It be hers she has gone to Beijing. A. must B.

问题补充：

–Whose notebook is this? Is it Julie’s?

–It be hers, she has gone to Beijing.

A. must B. mustn’t C. can’t

答案：

解析：考查情态动词。对某事的否定推测，用 can’t 。---这是谁的笔记本？是Julie’s吗？------它不可能是她的，她去了北京。故选C。