Question

---Look, Sue is over there.
--- That ____ be her. She is in Canada now.

A．mustn’ t

B．can’t

C．needn’t

D．won’t

Answer 1

B

考察情态动词的用法。根据句意“那不可能是她。她现在在加拿大了。”而对某事的否定推测用can’t.故选B。