阴偏衰多见于

A．心、肾

B．脾、肾

C．肺、肾

D．肝、肾

E．肺、肝、肾

—  She looks very happy. She      have passed the exam.

— I guess so. It's not difficult after all. [ ]

A. should        

B. could          

C. must              

D. might