---Hi Tom. Do you have any idea where Jane is?---She in the classroom. I saw her there w

问题补充：

---Hi, Tom. Do you have any idea where Jane is?

---She in the classroom. I saw her there writing her composition just now.

A. shall be

B. could be

C. must be

D. might be

答案：

A. shall be

B. could be

(答案→)C. must be

D. might be

解析：情态动词考查题，must表肯定推测。句意：汤姆你知道珍妮在哪吗？她一定在教室里刚才我看见她在那写作文。