________ made his family disappointed.[ ]

A. He not being chosen        

B. His not having been chosen

C. Him not being chosen      

D. He was not chosen

5月龄公猪，因怀疑患猪肺疫，用头孢噻呋肌注治疗3天，疗效欠佳，经实验室诊断为支原体肺炎混合感染巴氏杆菌，进一步治疗应加用的药物是（）（P368-34）

A、磺胺对甲氧嘧啶

B、乙酰甲喹

C、阿莫西林

D、泰妙菌素

E、喹乙醇