—He looks very happy. He ____have passed the exam,

—I guess so. It’s not difficult after all.

A．should

B．could

C．must

D．might

高钙血症，见于（）

A.肾癌

B.骨肉瘤

C.转移性骨癌

D.多发性骨髓瘤

E.原发性甲旁亢