I became a student ten years      . I have been a student           1996. I have studied here            about 10 years.

A．ago, since, for

B．ago ,for ,since,

C．ago, before, for

D．ago, in, after

既治疗胸痹又治疗腹痛的方剂为（）。

A.涤痰汤

B.黄连温胆汤

C.柴胡疏肝散

D.通窍活血汤

E.桃仁红花煎