问题
选择题
–Hi, Tom. Any idea where Jane is?
--She _______ in the classroom. I saw her there just now.
A．shall be
B．should have been
C．must be
D．might have been
答案
答案：C
考查情态动词表推测的用法。句意为：——你好，汤姆。知道简在哪里吗？——她一定在教室里，我刚才看见她在那里。B项和D项表示对过去事情的推测，shall be则表示将来。故选c。