—Where is Mr. Yu,do you know?

—Well,it's hard to say. But I heard him _____ loudly here just now.             [ ]

A. was reading           

B. reading  

C. had read              

D. to read

关于水肿，哪项描述正确

A．水肿伴肝大者见于肝性水肿

B．水肿伴心率快为心性水肿

C．水肿伴呼吸困难和发绀常为心性水肿

D．水肿伴消瘦为营养不良性水肿

E．水肿伴腹水为肝性水肿