—How I wish I had studied harder when I was in senior school! —If you had，you ________ a university student now.

A．are

B．would be

C．should

D．were

一男性结核性腹膜炎患者，在治疗中出现失眠、神经错乱，产生这种不良反应的药物可能是（）。

A.吡嗪酰胺

B.异烟肼

C.对氨基水杨酸

D.利福平

E.乙胺丁醇