下列哪一项不是喉罩的禁忌证（）。

A.饱胃

B.咽部脓肿

C.慢阻肺胸廓顺应性降低

D.张口受限患者

E.腹腔镜手术

—Do your friends like music?            

—Yes, one of my friends listens to _____music. He thinks it makes him comfortable.             [ ]

A. class      

B. classmate    

C. classical  

D. classroom