–Hi Tom. Any idea where Jane is?She in the classroom. I saw her there just now. A. sh

问题补充：

–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：

A. shall be

B. should have been

(答案→)C. must be

D. might have been

解析：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。