— Could you please tell Peter that I want to talk to him?

— Sure, I will let him know as soon as he             back. [ ]

A. comes

B. came

C. has come

D. will come

关于微囊的叙述中哪一项是错误的（）

A.微囊为圆球形或类球形的密闭囊状物

B.供肌内注射用的微囊粒径应符合混悬液注射剂的规定

C.供口服胶囊或片剂，粒径可在数十至数百微米之间

D.微囊载药量是指微囊中所包含的药物质量百分率

E.微囊中药物释放速率一般采用桨法进行测定