— Do you know whose book it is?

— It ______ be Li Lei's. His name is on it.

[      ]

A. can

B. may

C. might

D. must

以下有关旅店卫生说法正确的是：（）。

A.旅店应有防蚊、蝇、鼠、蟑螂的设施

B.要经常检查设施使用情况

C.旅店要做到室内外物蚊蝇孳生场所

D.以上都是