Mr Smith has______ cancer for two years but he is still working very hard.[ ]

A. suffered

B. suffered from

C. suffered by

D. suffering from

血管紧张素I转化酶抑制药最常见的不良反应是（）

A.高血钾

B.低血糖

C.体位性低血压

D.刺激性干咳

E.头痛、面红