—I called you at six o'clock yesterday evening but there was no reply.

—Oh, I'm sorry. I _______ dinner at my friend's. [ ]

A. was having

B. is having

C. had

D. have

医疗机构抗菌药物管理机构应当定期组织相关专业技术人员对抗菌药物处方、医嘱实施点评，点评结果的作用是（）

A.对医务人员合理用药知识培训和教育的依据

B.是对医院及科室药事管理、处方管理、临床用药管理考察的依据

C.是科学抽样、制定细则、及时公示、奖惩制度的依据

D.作为医师定期考核、临床科室和医务人员绩效考核依据

E.重点抽查外科、内科、儿科、妇产科、急诊科等临床科室专项点评的依据