— Hi TomAny idea where Mary is? ．一 She　in the reading room．I saw her there just now．A. s

问题补充：

— Hi, Tom．Any idea where Mary is? ．

一 Shein the reading room．I saw her there just now．

A. shall be

B. should have been

C. should be

D. might have been

答案：

A. shall be

B. should have been

(答案→)C. should be

D. might have been

解析：

这题考查情态动词的用法：这是对现在情况的猜测，所以排除B和D，这里是根据I saw her there just now．推理出她应该在阅览室。Should表示按道理应该，选C。