—What did he say?   —                .[ ]

A. He asked what could he do for us

B. He asked when would you come

C. He said he likes English very much

D. He said he would bring some fruit here

上述哪个镇痛药物常以其枸橼酸盐给药（）

A.哌替啶

B.可待因

C.芬太尼

D.吗啡

E.喷他佐辛