—Where is Sally?—I’m not sure. Shein the library.A. mightB. mustC. will beD. may be

问题补充：

—Where is Sally?

—I’m not sure. Shein the library.

A. might

B. must

C. will be

D. may be

答案：

A. might

B. must

C. will be

(答案→)D. may be

解析：本题回答语的含义是我不确定，那么她在图书馆只是一种可能性，may be表示可能性，故本题选D。